阅读说明：本技术 用于减少漏音的装置 (Device for reducing sound leakage ) 是由 吴融融 宋贤高 吉成霞 沈小祥 甘宏 于 2020-05-11 设计创作，主要内容包括：本申请公开了一种用于减少漏音的装置,其中,该装置包括壳体、第一发声元件和第二发声元件；壳体设有第一出音口和第二出音口；第一发声元件和第二发声元件均设于壳体内,第一发声元件位于第一出音口的内侧,第二发声元件位于第二出音口的内侧；所述第一发声元件、所述第二发声元件和所述壳体共同包围形成后腔；第一发声元件发射的第一音频信号和第二发声元件发射的第二音频信号具有相位差。通过第一发声元件和第二发声元件共用一个后腔,可以增加装置发射的音频信号中的低频分量,以增强用户对音频信号的收听效果。基于相位差,第一音频信号和第二音频信号在远场可以更好地相互抵消,以降低该些音频信号整体上在远场的响度,以降低漏音的可能。(The application discloses a device for reducing sound leakage, wherein the device comprises a shell, a first sound-producing element and a second sound-producing element; the shell is provided with a first sound outlet and a second sound outlet; the first sound-producing element and the second sound-producing element are arranged in the shell, the first sound-producing element is positioned on the inner side of the first sound outlet, and the second sound-producing element is positioned on the inner side of the second sound outlet; the first sound generating element, the second sound generating element and the shell are jointly surrounded to form a rear cavity; the first audio signal emitted by the first sound emitting element and the second audio signal emitted by the second sound emitting element have a phase difference. By sharing one rear cavity by the first sound-emitting element and the second sound-emitting element, the low-frequency component in the audio signal emitted by the device can be increased so as to enhance the listening effect of the user on the audio signal. Based on the phase difference, the first audio signal and the second audio signal can better cancel each other in the far field, so that the loudness of the audio signals in the far field as a whole is reduced, and the possibility of sound leakage is reduced.)

1. An apparatus for reducing sound leakage, comprising: the sound generating device comprises a shell, a first sound generating element and a second sound generating element;

the shell is provided with a first sound outlet and a second sound outlet;

the first sound-generating element and the second sound-generating element are arranged in the shell, the first sound-generating element is positioned on the inner side of the first sound outlet, and the second sound-generating element is positioned on the inner side of the second sound outlet; the first sound generating element, the second sound generating element and the shell are jointly surrounded to form a rear cavity;

the first audio signal emitted by the first sound emitting element and the second audio signal emitted by the second sound emitting element have a phase difference.

2. The apparatus of claim 1, wherein the first audio signal and the second audio signal are 90-270 ° out of phase.

3. The apparatus of claim 2, wherein the first audio signal and the second audio signal are 160-200 ° out of phase.

4. A device as claimed in any one of claims 1 to 3, wherein the sound emitting surface of the first sound emitting element and the sound emitting surface of the second sound emitting element face in the same direction.

5. The device of claim 4, wherein the housing has a first face and a side face that are connected;

the first sound outlet and the second sound outlet are both positioned on the first surface; or, the first sound outlet and the second sound outlet are both located between the first surface and the side surface.

6. The device of claim 4, wherein the distance between the first sound outlet and the second sound outlet is 5mm to 50 mm.

7. A device as claimed in any one of claims 1 to 3, wherein the sound emitting face of the first sound emitting element and the sound emitting face of the second sound emitting element are oriented differently.

8. The device of claim 7, wherein the housing has a first face and a side face that are perpendicular to each other; the first sound outlet is located on the first surface, and the second sound outlet is located on the side surface.

9. The device of claim 7, wherein the sound emitting surface of the first sound emitting element and the sound emitting surface of the second sound emitting element face in opposite directions.

10. The device of claim 7, wherein the housing has a first face, a side face, and a second face in series;

the first sound outlet and the second sound outlet are both positioned on the side surface; or, the first sound outlet is located between the first surface and the side surface, and the second sound outlet is located between the second surface and the side surface.

11. The apparatus of claim 7, wherein a distance between the first sound outlet and the second sound outlet is 3mm to 30 mm.

12. A device as claimed in any one of claims 5, 6, 8 to 11, wherein the volume of the rear chamber is 0.1mm³～1.5mm³。

13. Such asThe device of any one of claims 5, 6, and 8 to 11, wherein the first sound outlet and the second sound outlet are each 2mm in area²～20mm²。

14. An apparatus as claimed in any one of claims 5, 6, 8 to 11, wherein the first audio signal and the second audio signal are the same audio source.

15. An apparatus as claimed in any one of claims 5, 6, 8 to 11, wherein the first audio signal and the second audio signal have a difference in amplitude.

16. The device of claim 15, further comprising processing circuitry electrically connected to the first and second sound generating elements, respectively;

the processing circuit is used for applying corresponding amplitude difference and phase difference to different frequency components in the frequency spectrum according to the frequency spectrum of the electric signal so as to divide the electric signal into a first electric signal and a second electric signal; and transmitting a first electrical signal to the first sound generating element and a second electrical signal to the second sound generating element.

17. The apparatus of claim 16, wherein the apparatus is applied to an electronic device, and the apparatus is a separate module in the electronic device.

18. The apparatus of claim 16, wherein the apparatus is an electronic device and the housing is a housing of the electronic device.

19. The apparatus of claim 17 or 18, wherein the electronic device is a cell phone.

Technical Field

The present application relates to the field of communications technologies, and in particular, to an apparatus for reducing noise leakage.

Background

With the popularization of mobile phones and the growth of mobile online communication applications, the times of telephone and voice chatting performed by users through mobile phones are gradually increased.

Under normal state, the sound of the other party is emitted from the mobile phone, and the user can acquire the related information through the sound emitted by the mobile phone. However, other people standing around or walking by the mobile phone may also hear the sound emitted by the mobile phone, thereby causing a sound leakage and easily causing the user to be leaked privacy information about the call, voice, and the like.

Disclosure of Invention

The application aims to provide a device for reducing sound leakage so as to solve the problem that sound leakage easily occurs to electronic equipment such as a normal mobile phone.

In order to solve the above technical problem, the present application provides an apparatus for reducing sound leakage, the apparatus comprising: the sound generating device comprises a shell, a first sound generating element and a second sound generating element. The shell is provided with a first sound outlet and a second sound outlet. First vocal element with second vocal element all locates in the casing, first vocal element is located the inboard of first sound outlet, second vocal element is located the inboard of second sound outlet, first vocal element second vocal element with the casing surrounds formation back chamber jointly. The first audio signal emitted by the first sound emitting element and the second audio signal emitted by the second sound emitting element have a phase difference. It will be appreciated that, based on the phase difference relationship, the first audio signal and the second audio signal may better cancel each other in the far field to reduce the loudness of the audio signals in the far field as a whole, thereby reducing the leakage. In addition, since the phase difference also causes a certain degree of loudness reduction in the near field, in order to improve the presentation effect of the two audio signals in the near field as a whole, the present application also shares the first sound-generating element and the second sound-generating element with one rear cavity. When the first sound generating element and the second sound generating element synchronously emit the first audio signal and the second audio signal having different phases correspondingly, for example: the first sound-generating element is located to compress the air in the rear chamber to emit a first audio signal, and the second sound-generating element is located to stretch the air in the rear chamber to emit a second audio signal. Accordingly, the first sound-emitting element and the second sound-emitting element can smoothly emit corresponding audio signals by compressing and stretching air, so that the low-frequency radiation efficiency of the first audio signal and the second audio signal in the near field as a whole (especially for low-frequency signals below 400 Hz) is improved, and the low-frequency loudness in the near field (which is difficult to improve by means of digital signal processing) is improved, so that a user can listen to the audio signals better. That is to say, compared with the existing common device, the device for reducing the leakage sound of the embodiment can improve the loudness of the near field and reduce the loudness of the far field, so that the leakage sound is reduced and the call quality is maintained.

In some embodiments, the first audio signal and the second audio signal are 90-270 ° out of phase. Based on the existing phase difference, the first sound generating element and the second sound generating element can be respectively adjusted to enable the corresponding first audio signal and the second audio signal to generate polarization in certain directions, so that the listening effect of the user on the audio signal of the device in the certain directions can be enhanced.

In some embodiments, the first audio signal and the second audio signal are 160-200 ° out of phase. It should be appreciated that based on the 160-200 phase difference range, the first audio signal and the second audio signal are less likely to be heard by others in the far field as a whole, to reduce the possibility of relevant private information being leaked.

In some embodiments, the sound emitting surface of the first sound emitting element and the sound emitting surface of the second sound emitting element face in the same direction. It should be understood that under the combined action of the first audio signal and the second audio signal, the user can relatively clearly identify the information carried in the first audio signal and the second audio signal, so as to improve the communication experience of the user and reduce the noise pollution to other people caused by the user listening to the related audio signals.

In some embodiments, the housing has a first face and a side face that are connected. The first sound outlet and the second sound outlet are both positioned on the first surface; or, the first sound outlet and the second sound outlet are both located between the first surface and the side surface. It will be appreciated that by spacing the first and second sound outlets at the corners of the first and side faces, the likelihood of both sound outlets being blocked is reduced, facilitating listening by a user through the ears on either side.

In some embodiments, the distance between the first sound outlet and the second sound outlet is 5mm to 50 mm. It should be understood that, by designing the distance between the first sound outlet and the second sound outlet, it can be ensured that the first audio signal and the second audio signal can generate a physical phenomenon related to fresnel diffraction, interference, etc. in the near field, so as to enhance the presentation effect of the first audio signal and the second audio signal in the near field, and facilitate listening by a user.

In some embodiments, the sound emitting surface of the first sound emitting element and the sound emitting surface of the second sound emitting element are oriented differently. Based on this, by stacking the first sound emitting element and the second sound emitting element, the volume occupied by the first sound emitting element and the second sound emitting element can be reduced to save space.

In some embodiments, the housing has a first face and a side face that are perpendicular to each other; the first sound outlet is located on the first surface, and the second sound outlet is located on the side surface. Based on this, the second sound outlet located at the side is not easily blocked by the head or fingers of the user, and can be convenient for emit the second audio signal, so as to improve the communication experience of the user.

In some embodiments, the sound emitting surface of the first sound emitting element and the sound emitting surface of the second sound emitting element face oppositely.

In some embodiments, the housing has a first face, a side face, and a second face connected in series. The first sound outlet and the second sound outlet are both positioned on the side surface; or, the first sound outlet is located between the first surface and the side surface, and the second sound outlet is located between the second surface and the side surface. Based on this, the possibility that the first and second sound outlets are blocked by the user may be reduced so as to transmit the first and second audio signals correspondingly.

In some embodiments, the distance between the first sound outlet and the second sound outlet is 3mm to 30 mm. It should be understood that, by designing the distance between the first sound outlet and the second sound outlet, it can be ensured that the first audio signal and the second audio signal can generate a physical phenomenon related to fresnel diffraction, interference, etc. in the near field, so as to enhance the presentation effect of the first audio signal and the second audio signal in the near field, and facilitate listening by a user.

In some embodiments, the volume of the back cavity is 0.1mm³～1.5mm³. Based on this, rear cavities of corresponding volumes can be provided in the device according to the type, specification, relative positional relationship, and the like of the first sound emitting element and the second sound emitting element required. In this way, the device accommodates the first and second sound emitting elements while having a certain amount of air in the rear cavity between the first and second sound emitting elements in order to emit the corresponding first and second audio signals.

In some embodiments, the areas of the first sound outlet and the second sound outlet are both 2mm²～20mm². Based on the area of the first sound outlet, components with different frequencies in the first audio signal can be ensured to be radiated to a free space through the first sound outlet; similarly, components of different frequencies in the second audio signal can also radiate well into free space through the second sound outlet for the user to listen to.

In some embodiments, the first audio signal and the second audio signal are the same audio source. It will be appreciated that the first sound generating element and the second sound generating element are both sources of sound heard by the user from the point of view of the user looking at the device. The first audio signal and the second audio signal carry the same information; such as: the first audio signal and the second audio signal can be sounds generated by a user during a call; alternatively, the first audio signal and the second audio signal may both refer to sounds made based on a click of information/song in speech form.

In some embodiments, the first audio signal and the second audio signal have an amplitude difference. Based on the amplitude difference, when the first audio signal and the second audio signal reach the same viewpoint, the difference in sound pressure amplitude of the first audio signal and the second audio signal can be made to be reduced to better achieve mutual cancellation.

In some embodiments, the device further comprises processing circuitry electrically connected to the first and second sound generating elements, respectively. The processing circuit is used for applying corresponding amplitude difference and phase difference to different frequency components in the frequency spectrum according to the frequency spectrum of the electric signal so as to divide the electric signal into a first electric signal and a second electric signal; and transmitting a first electrical signal to the first sound generating element and a second electrical signal to the second sound generating element. It should be understood that the application of the corresponding amplitude difference and phase difference to the electrical signals may be adjusted by the developer according to the structure, experiment, simulation, hardware structure, etc. of the device, and the combined action of the amplitude difference and the phase difference can make the first audio signal and the second audio signal cancel each other in the far field.

In some embodiments, the first sound generating element and the second sound generating element are both receivers. When a user uses the device to carry out operations such as conversation, based on the matching of the first sound-emitting element, the second sound-emitting element and the shell, the user can more smoothly acquire related contents in the first audio signal and the second audio signal, so that the chat experience of the user is improved.

In some embodiments, the first sound emitting element and the second sound emitting element are both speakers. When the user uses the device of each embodiment to perform operations such as voice chat or music playing, the user can select to play the voice chat or music playing through the loudspeaker based on the matching of the first sound-emitting element, the second sound-emitting element and the shell so as to receive and hear related information in a certain range.

In some embodiments, one of the first sound generating element and the second sound generating element is a receiver and the other is a speaker. It should be understood that the receiver can be adjusted by equalization, gain, filtering, etc. to make the receiver and the speaker have the same or substantially the same frequency, amplitude, phase, etc. acoustic properties, so as to improve the user's chat experience or music listening experience.

In some embodiments, the apparatus is applied to an electronic device. It should be understood that the apparatus is a stand-alone module in an electronic device and may be assembled into the electronic device by way of a detachable connection. It should be understood that the relationship between the device and the electronic equipment can be similar to the relationship between the screen module, the camera module, etc. and the electronic equipment; the screen module and the camera module are also used as independent modules and are assembled into the electronic equipment in a detachable connection mode.

In some embodiments, the device is an electronic device and the housing of the device is a housing of the electronic device. It should be understood that the housing may include a bezel, a back cover, and a bezel of the electronic device. Therefore, in the space formed by the middle frame surrounding the rear cover, a relatively independent cavity can be formed by matching with the baffle plate so as to accommodate the first sound-generating element and the second sound-generating element.

In some embodiments, the electronic device may be a cell phone. In addition, the electronic device can also be a tablet computer or an interphone and the like.

This application can increase the low frequency component in the audio signal of device transmission through the design of first sound generating element and the sharing back chamber of second sound generating element to reinforcing user's listening effect to audio signal. Through the phase difference design of the first audio signal and the second audio signal, the possibility that other people hear the audio signal emitted by the device can be reduced, noise pollution is reduced, and the possibility that privacy information related to a user is leaked is reduced.

Drawings

FIG. 1 is a schematic perspective view of an apparatus according to an embodiment of the present application;

FIG. 2 is a front view of the apparatus of an embodiment of the present application;

FIG. 3 is a cross-sectional view of an apparatus according to an embodiment of the present application;

FIG. 4 is a schematic diagram of low frequency radiation in the far field of a dipole and pulsating sphere source in accordance with an embodiment of the present application;

FIG. 5 is a graph of the frequency response of a dipole and a pulsating sphere source in the near far field according to an embodiment of the present application;

FIG. 6 is a schematic perspective view of an apparatus according to another embodiment of the present application;

FIG. 7 is a cross-sectional view of an apparatus according to another embodiment of the present application;

FIG. 8 is an enlarged fragmentary view of the apparatus of FIG. 7 in region I;

FIG. 9 is a schematic perspective view of an apparatus according to yet another embodiment of the present application;

FIG. 10 is a cross-sectional view of an apparatus according to yet another embodiment of the present application;

FIG. 11 is an enlarged fragmentary view of the apparatus of FIG. 10 in area II;

fig. 12 is a block diagram of an apparatus according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

The embodiments of the present application provide a device for reducing sound leakage, which can enhance the listening effect of a user on an audio signal emitted by the device, and simultaneously can correspondingly reduce the possibility that other people hear the audio signal emitted by the device, so as to ensure that the privacy information related to the user is not leaked.

It should be understood that the means for reducing sound leakage may be a separate module and may be assembled into the electronic device by means of a detachable connection; it should be understood that the relationship between the device and the electronic device can be similar to the relationship between the screen module, the camera module, and other modules and the electronic device; the screen module and the camera module are also used as independent modules and are assembled into the electronic equipment in a detachable connection mode. Alternatively, the device for reducing sound leakage is an electronic device, and the application does not limit this.

In order to facilitate understanding of the technical solutions of the present application, the following description will mainly be given by taking a relatively widely used electronic device, such as a mobile phone, as an example. But not limited to this, the electronic device related to the present application may also be an electronic device capable of realizing a call, or playing voice, or playing a song, such as a tablet computer, an interphone, and the like.

In a normal mobile phone, while an audio signal transmitted by the mobile phone through a call, a voice chat, or the like is listened to by a user, the audio signal is also easily listened to by other intentionally overheard people due to the reason of omnidirectional radiation of the audio signal, reflection of the head of the user on the audio signal, and the like, so that related privacy information is leaked. For some persons who are unintentionally overheard, the audio signal emitted from the user's handset is actually a noise pollution, easily causing hearing discomfort to the person.

Therefore, the user also adopts ways of reducing the volume of the mobile phone or enabling the earphone of the mobile phone to be close to the ear, and the like, so that the possibility that the audio signal is heard by other people is reduced, and the influence of the audio signal on other people is correspondingly reduced. However, the way of reducing the volume is not good, i.e. the user himself is apt to not hear the audio signal emitted by the mobile phone, so that the other party who needs to talk over again or the user himself replays the voice. The effect of the mode of making the receiver close to the ear is not ideal, and the audio signal sent by the mobile phone receiver is easy to generate physical phenomena such as reflection, diffraction and the like through the head of the user, so that people around the user can still relatively clearly hear the sound sent by the mobile phone of the user, and noise pollution is easy to generate.

Referring to fig. 1 to fig. 3 synchronously, in order to solve the above problem, an apparatus 10 for reducing noise leakage according to an embodiment of the present application includes: a housing 100 and a first sound-emitting element 110. The first sound emitting element 110 is disposed within the housing 100, and a first audio signal generated by the first sound emitting element 110 can be emitted outward through the sound outlet surface 112 thereof for listening by a user. Unlike the normal electronic device, the device 10 of the embodiments further includes a second sound emitting element 120 cooperating with the first sound emitting element 110. The second sound generating element 120 is also disposed within the housing 100 and is capable of emitting a second audio signal to perform substantially the same function as the first sound generating element 110.

In some embodiments, when the apparatus 10 is an electronic device, the housing 100 may include a bezel, a back cover, and a bezel of the electronic device. Therefore, in the space formed by the middle frame surrounding the rear cover, a relatively independent cavity can be formed by matching with the baffle plate so as to accommodate the first sound-generating element and the second sound-generating element. It should be understood that the baffle may be integrally formed with the back cover by a mold; alternatively, the fixing is realized by welding or the like, which is not limited.

It should be understood that the first and second audio signals emitted by the device 10 of the various embodiments are the same source of sound, and it should be understood that the first sound-emitting element 110 and the second sound-emitting element 120 are both sources of sound heard by the user from the perspective of the user viewing the device 10. The first audio signal and the second audio signal carry the same information; such as: the first audio signal and the second audio signal can be sounds generated by a user during a call; alternatively, the first audio signal and the second audio signal may both refer to sounds made based on clicking of information/songs in the form of speech, without limitation.

In order to reduce the possibility that the audio signal emitted from the apparatus 10 is heard by other people, the apparatus 10 provided by the present application is to make the first sound emitting element 110 and the second sound emitting element 120 equivalent to an acoustic dipole, and the first audio signal emitted from the first sound emitting element 110 and the second audio signal emitted from the second sound emitting element 120 have a certain phase difference, that is, the phase difference between the first audio signal and the second audio signal is not equal to 0 °. It should be understood that, based on the phase difference, in a far field defined by a physical quantity such as Rayleigh length (Rayleigh length), the first audio signal and the second audio signal can cancel each other to some extent, so that the possibility that others in the far field hear the audio signal emitted by the user's handset can be reduced, and the possibility that privacy information related to the user is leaked can be reduced.

In some embodiments, the two audio signals may be made to have a phase difference of about 180 ° to cancel each other as much as possible when they are transmitted from the near field to the far field based on a phase difference design of the first audio signal and the second audio signal.

Referring to fig. 4, in order to understand the effect of a certain phase difference between two audio signals, the phase difference between the first audio signal and the second audio signal is 180 ° as an example.

In contrast to the sound generating element used alone in a normal mobile phone (corresponding to the pulsating ball source in fig. 4), the embodiments of the present application are equivalent to the first sound generating element 110 and the second sound generating element 120 as a dipole (corresponding to the dipole in fig. 4). The first audio signal emitted by the first sound emitting element 110 and the second audio signal emitted by the second sound emitting element 120 have the same sound pressure amplitude and opposite phases. Since the distance from the far field is relatively long with respect to the device 10 as a sound source, the difference in sound pressure amplitude between the two audio signals is small at any observation point in the far field, but the phase difference between the two audio signals still has a large influence.

When the phase difference of the first audio signal and the second audio signal is 180 °, the first audio signal and the second audio signal as a whole are less likely to be heard by others in the far field based on the relationship of the opposite phases to reduce the possibility that the relevant private information is leaked. As can be seen from fig. 4, in the far-field presentation effect, the amplitude of the first audio signal and the second audio signal emitted by the apparatus 10 of the embodiments is smaller at any angle than that of the single sound emitting element; that is, the first audio signal and the second audio signal are less efficient in radiation as a whole, and therefore the degree of sound leakage in the far field can be reduced. As illustrated in fig. 4, averaging the frequency loudness of the dipoles at various angles, it can be concluded that the dipoles as a whole can reduce the frequency loudness by about 20dB in the far field.

Corresponding to actual conversation, voice chat, etc., it can be understood that the first audio signal and the second audio signal emitted by the apparatus 10 are not easily heard by others around the user. Based on this, when the user performs operations such as a call, a voice chat, and the like through the apparatus 10 of each embodiment, the first audio signal and the second audio signal generated based on the operations such as the call, the voice chat, and the like are less likely to be heard by other people while being heard by the user. Thus, the apparatus 10 of the embodiments can reduce the possibility of leakage of private information related to the user, and reduce noise pollution caused by voice operation such as conversation and voice chat performed by the user.

In some embodiments, the first audio signal and the second audio signal are 90-270 ° out of phase, depending on design requirements and/or user usage requirements. Such as: the phase difference is 90 °, 105 °, 120 °, 135 °, 150 °, 165 °, 180 °, 195 °, 210 °, 225 °, 240 °, 255 °, or 270 °.

It should be understood that the first sound emitting element 110 and the second sound emitting element 120 of each embodiment are relatively independent two devices, unlike a normal cellular phone. Therefore, based on the above ranges of phase differences, the first sound emitting element 110 and the second sound emitting element 120 can be respectively adjusted to enable the corresponding first audio signal and the second audio signal to be polarized in certain orientations, so that the listening effect of the user on the audio signals of the apparatus 10 in the certain orientations can be enhanced. It should be understood that the adjustment of the phase difference, for example, can be performed by digital signal processing technique at the electrical input end; or the phase is regulated and controlled by designing structures such as a rear cavity. It should be understood that the back cavity refers to a cavity behind the sound generating element, i.e. the back cavity faces away from the sound emitting surface of the sound generating element.

In some embodiments, the phase difference between the first audio signal and the second audio signal is 160 ° to 200 ° in consideration of the relative positions of the first sound emitting element and the second sound emitting element, the design of the first sound outlet and the second sound outlet, and the like. Such as: the phase difference is 170 ° or 185 °, etc. It should be appreciated that within this range of phase difference, the first audio signal and the second audio signal may better cancel each other in the far field to reduce the loudness of the audio signals in the far field as a whole.

In other embodiments, the listening effect of the audio signals in certain directions can be enhanced by adjusting the structural damping of the first sound emitting element 110 and the second sound emitting element 120, which is not limited in this application.

Referring to fig. 3 to 5 synchronously, in order to enhance the presentation effect of the first audio signal and the second audio signal emitted by the device 10 of the embodiments in the near field as a whole, so as to facilitate the user to listen to the audio signals, the casing 100 of the device 10 is configured to have the first sound outlet 104 and the second sound outlet 106 which are opposite.

The first sound generating element 110 and the second sound generating element 120 are all arranged in the shell 100, and the first sound generating element 110, the second sound generating element 120 and the shell 100 jointly surround to form a rear cavity 102; that is, the first sound emitting element 110 and the second sound emitting element 120 share one rear chamber 102. The first sound emitting element 110 is located inside the first sound outlet 104 corresponding to the first sound outlet 104 and the second sound outlet 106, and emits the first audio signal through the first sound outlet 104. The second sound emitting element 120 is located inside the second sound outlet 106, and emits the second audio signal through the second sound outlet 106.

It should be understood that the first sound outlet 104 and the second sound outlet 106 each have opposite inner and outer sides. The inner side is the side directed to the inside of the housing or to the sound generating element, and the outer side is the side directed to the free space. Based on this, the first audio signal may be transmitted from the inner side of the first sound outlet 104 and then transmitted from the outer side of the first sound outlet to radiate to a free space. Similarly, the second audio signal may also be transmitted from the inner side of the second sound outlet 106 and then transmitted from the outer side of the second sound outlet 106 to radiate to the free space.

It should be understood that the sound outlet 112 of the first sound emitting element 110 and the sound outlet 122 of the second sound emitting element 120 may be oriented in the same or different directions. The housing 100 of the device 10 of each embodiment has a first face 100a, a side face 100b, and a second face 100c connected in this order. The first sound outlet 104 and the second sound outlet 106 may be located on the same face or different faces of the device 10, as desired. In some embodiments, the side 100b is located between the first face 100a and the second face 100c, and the first face 100a and the second face 100c are not in contact. In other embodiments, the first face 100a, the side face 100b and the second face 100c are in contact with each other, which is easy to understand and can be analogous to three adjacent faces in a polyhedron.

For example, taking the device 10 as an electronic device as an example, the first side 100a is exemplified as the front side of the device 10, i.e., the side having the display screen and/or the keys; the second side 100c is illustrated as the back side of the device 10, i.e., the side with the back cover and/or rear camera; side 100b is illustrated as corresponding to one side of the frame of device 10.

It should be understood that the positional relationship of the first face 100a, the side face 100b and the second face 100c is relative. In other embodiments, the first side 100a may also refer to a back side or a side of the device 10, which is not limited.

Such as: the apparatus 10 or an electronic device comprising the apparatus 10 is exemplified by a notebook computer. In a state where the notebook computer is normally placed, the first side 100a may refer to a back side of the notebook computer; correspondingly, the second side 100c is the front side of the notebook computer. Alternatively, the first side 100a is a side of the notebook computer, and correspondingly, the side 100b is a front or back of the notebook computer, and the second side 100c is another side 100b of the notebook computer far from the first side 100 a.

In some embodiments, the design of the phase difference is combined with the structure of the rear cavity 102, so that the apparatus 10 of various embodiments can skillfully enhance the presentation effect of the first audio signal and the second audio signal in the near field.

For example, when the first sound emitting element 110 and the second sound emitting element 120 simultaneously emit the first audio signal and the second audio signal having different phases through the rear chamber 102, respectively, the second sound emitting element 120 is in a state of stretching the air in the rear chamber 102 based on the existence of the phase difference, for example, the first sound emitting element 110 is in a state of compressing the air in the rear chamber 102. Due to the synchronization of the compressed air and the stretching air, the air in the rear chamber 102 is not substantially compressed; i.e., the amount of air remains substantially constant, which can equate the volume of the rear chamber 102 to infinity.

Based on this, the first sound emitting element 110 and the second sound emitting element 120 can both smoothly emit corresponding audio signals by compressing and stretching air, so that the problems of low frequency components and the like in the audio signals which are easily generated in normal mobile phones can be overcome. Accordingly, by the cooperation of the first sound emitting element 110, the second sound emitting element 120 and the rear cavity 102, the device 10 of various embodiments can increase the low frequency sound radiation efficiency of the first audio signal and the second audio signal to improve the low frequency loudness. Those skilled in the art can understand that in the process of audio signal processing, the loudness of a medium-high frequency signal (e.g., a signal of about 800Hz to 8000 Hz) is easily increased by means of digital signal processing (e.g., by the equalizer EQ), but the loudness of a low frequency signal (e.g., a low frequency signal of several hundred Hz) cannot be increased simply by the EQ, and the loudness of a low frequency signal can be increased by the cooperation of the first sound generating element 110, the second sound generating element 120 and the rear cavity 102 (even if the near field generates a certain degree of loudness reduction due to phase difference), so that the effects that the loudness is reduced better in the far field and the loudness is increased in the near field are achieved, and therefore, the call quality is ensured, and the sound leakage is reduced.

Referring to fig. 5, it can be seen that the two audio signals have a larger frequency response Gap (Gap) in the near field and the far field as a whole. It should be appreciated that in the presentation effect of the near field, the first audio signal and the second audio signal emitted by the apparatus 10 of the embodiments are more radiation efficient overall and have a higher frequency loudness in the range of 100Hz to 400Hz than the audio signal emitted by a single sound emitting element, so that the audio signals are heard by a user in the near field; as illustrated in fig. 5, the frequency loudness in the range of 100Hz to 400Hz is improved by approximately 5 dB. While the loudness of frequencies in the range of 400Hz to 10000Hz is substantially the same as a single sound emitting element.

Referring again to fig. 5, in the far-field presentation effect, the device 10 of the embodiments makes the first audio signal and the second audio signal emitted by the device 10 have lower radiation efficiency as a whole through the cooperation of the first sound-emitting element 110, the second sound-emitting element 120 and the rear cavity 102, so that the sound leakage can be reduced to reduce the possibility that the first audio signal and the second audio signal are heard by other people in the far-field.

In a scene corresponding to an actual call, voice chat, and the like, when a user performs a call, voice chat, and the like through the apparatus 10 of each embodiment, the first audio signal and the second audio signal generated based on the related operations may enhance the listening effect of the user in the near field on the audio signals while being not easily heard by other people in the far field, so as to ensure that the user smoothly performs the call, voice chat, and the like.

In some embodiments, when the first audio signal and the second audio signal reach the same observation point (e.g., a certain point in the far field), there may still be a certain difference in the actual sound pressure amplitude of the two audio signals; in this regard, in order to make the two audio signals cancel each other as much as possible, the first audio signal and the second audio signal of each embodiment may have a certain amplitude difference therebetween; i.e. with a certain sound pressure amplitude difference. Based on the sound pressure amplitude difference, when the first audio signal and the second audio signal reach the same observation point, the difference of the sound pressure amplitudes of the first audio signal and the second audio signal can be reduced to better achieve mutual cancellation. Thus, others at the observation point are less likely to hear the relevant private information. It should be appreciated that the sound pressure amplitude difference between the first audio signal and the second audio signal may be adaptively adjusted according to the configuration of the rear cavity 102 and/or the sound outlet (104, 106) to enable the first audio signal and the second audio signal to better cancel in the far field, which is not limited in this application.

In some embodiments, the volume of the rear chamber 102 of the device 10 is 0.1mm³～1.5mm³. Such as: the volume of the rear cavity 102 is 0.1mm³、0.2mm³、0.3mm³、0.4mm³、0.5mm³、0.6mm³、0.7mm³、0.8mm³、0.9mm³、1.0mm³、1.1mm³、1.2mm³、1.3mm³、1.4mm³Or 1.5mm³. Based on this, the rear cavity 102 of the corresponding volume can be provided in the device 10 according to the type, specification, relative positional relationship, and the like of the first sound emitting element 110 and the second sound emitting element 120 as required. Thus, the device 10 is receiving a first shotThe acoustic element 110 and the second sound generating element 120 are simultaneously such that the rear cavity 102 between the first sound generating element 110 and the second sound generating element 120 is provided with a volume of air in order to emit the corresponding first audio signal and second audio signal.

In some embodiments, the areas of the first sound outlet 104 and the second sound outlet 106 are both 2mm²～20mm². Such as: the volume of the rear cavity 102 is 2mm²、3mm²、4mm²、5mm²、6mm²、7mm²、8mm²、9mm²、10mm²、11mm²、12mm²、13mm²、14mm²、15mm²、16mm²、17mm²、18mm²、19mm²Or 20mm². Based on the area of the first sound outlet 104, it can be ensured that components of different frequencies in the first audio signal can be radiated to the free space through the first sound outlet 104 well; similarly, components of different frequencies in the second audio signal can also radiate well into free space through the second sound outlet 106 for listening by the user.

To simplify the analysis for easy understanding of the technical solutions, the following is to use the first audio signal emitted by the first sound emitting element 110 as the audio signal mainly listened to by the user, and the second audio signal emitted by the second sound emitting element 120 as the audio signal for assisting the user to listen to. It should be understood that the present application is not limited to the second audio signal emitted by the second sound emitting element 120 as the audio signal mainly listened to by the user, and the first audio signal emitted by the first sound emitting element 110 as the audio signal for assisting the user to listen to.

Referring to fig. 1 to 3 again, in an apparatus 10 provided in an embodiment of the present application, a first sound generating element 110 and a second sound generating element 120 are both located in a casing 100, and together with the casing 100, form a rear cavity 102; the first sound emitting element 110 and the second sound emitting element 120 are spaced apart and oriented in the same direction. The first sound outlet 104 and the second sound outlet 106 are located on the same plane of the housing 100, corresponding to the first sound generating element 110 and the second sound generating element 120. Such as: the first sound outlet 104 and the second sound outlet 106 are both located on the first surface 100 a. Based on this, the first audio signal may radiate into free space through the first sound outlet 104, and the second audio signal may radiate into free space through the second sound outlet 106 synchronously or substantially synchronously.

Under the combined action of the first audio signal and the second audio signal, a user can clearly identify information carried in the first audio signal and the second audio signal so as to improve the communication experience of the user; and other people around the user cannot easily hear the information carried in the first audio signal and the second audio signal, so that the possibility of leakage of corresponding private information is reduced, and noise pollution to other people caused by the fact that the user listens to the related audio signals is reduced.

In some other embodiments, the first sound outlet and the second sound outlet are both located between the first face and the side face, i.e. the first outlet and the second sound outlet are both located at the corners of the first face and the side face. It will be appreciated that due to the particularities of the human structure, the ear is located obliquely behind the mouth. When a user picks up the device for a conversation, the device tends to tilt at an angle that substantially coincides with the mouth-to-ear angle. Therefore, by positioning the first sound outlet and the second sound outlet at the corner of the first face and the side face at intervals, on one hand, the possibility that the two sound outlets are blocked can be reduced; on the other hand, listening by the user through either ear may be facilitated and the angle at which the device needs to be tilted may be reduced to enhance the user experience.

Referring to fig. 1 and fig. 2, in some embodiments, the distance between the first sound outlet 104 and the second sound outlet 106 is 5mm to 50 mm. It should be understood that this distance refers to the shortest distance (straight distance) between the first sound outlet 104 and the second sound outlet 106; alternatively, the distance refers to the shortest distance (straight distance) between the center point of the first sound outlet 104 and the center point of the second sound outlet 106.

Such as: the distance between the first sound outlet 104 and the second sound outlet 106 is 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm or 50 mm. It should be understood that, by designing the distance between the first sound outlet 104 and the second sound outlet 106, it can be ensured that the first audio signal and the second audio signal can generate fresnel diffraction, interference, and other related physical phenomena in the near field, so as to enhance the presentation effect of the first audio signal and the second audio signal in the near field, and facilitate the listening of a user. In the far field, the first audio signal and the second audio signal cancel each other to some extent due to the phase difference between the first audio signal and the second audio signal, so that other people cannot easily hear the related content in the first audio signal and the second audio signal.

Referring to fig. 1 and fig. 2 synchronously, in some embodiments, taking a mobile phone as an example, the first sound outlet 104 and the second sound outlet 106 are both located on a front surface of the mobile phone and are close to an edge of the front surface; the main part of the front of the mobile phone is a screen to present relevant image information. Correspondingly, the first sound outlet 104 may be disposed at the middle of the edge of the front surface, and the second sound outlet 106 is disposed at a distance from the first sound outlet 104 and near the corner of the front surface of the mobile phone. When a user performs operations such as talking and voice chat using the device 10, the user will habitually bring the front edge close to his or her ear when picking up the device 10, depending on the usage habits of most users. Therefore, the position of the first sound outlet 104 is arranged in the middle of the edge of the front face to meet the use habit of the user, and the second sound outlet 106 close to the corner of the front face can facilitate the emission of the second audio signal, so as to improve the communication experience of the user.

Referring to fig. 6 to 8 synchronously, in another device 10 provided in the embodiment of the present application, unlike the device 10 described above, the first sound emitting element 110 and the second sound emitting element 120 of the device 10 are oriented differently, and the angle between the sound emitting surface 112 of the first sound emitting element 110 and the sound emitting surface 122 of the second sound emitting element 120 is 90 °. Based on this, by stacking the first sound emitting element 110 and the second sound emitting element 120, the volume occupied by the first sound emitting element 110 and the second sound emitting element 120 can be reduced to save space.

The first sound outlet 104 and the second sound outlet 106 are located on different surfaces of the housing 100, corresponding to the first sound emitting element 110 and the second sound emitting element 120. Such as: the first surface 100a and the side surface 100b are perpendicular to each other, the first sound outlet 104 is located on the first surface 100a, and the second sound outlet 106 is located on the side surface 100 b.

Referring to fig. 8, in some embodiments, the distance between the first sound outlet 104 and the second sound outlet 106 is 3mm to 30 mm. It should be understood that this distance refers to the shortest distance/straight distance between first sound outlet 104 and second sound outlet 106; alternatively, the distance refers to the shortest distance/straight distance between the center point of the first sound outlet 104 and the center point of the second sound outlet 106.

Such as: the distance between the first sound outlet 104 and the second sound outlet 106 is 3mm, 6mm, 9mm, 12mm, 15mm, 18mm, 21mm, 24mm, 27mm or 30 mm. It should be understood that, by designing the distance between the first sound outlet 104 and the second sound outlet 106, it can be ensured that the first audio signal and the second audio signal can generate fresnel diffraction, interference, and other related physical phenomena in the near field, so as to enhance the presentation effect of the first audio signal and the second audio signal in the near field, and facilitate the listening of a user. In the far field, the first audio signal and the second audio signal cancel each other to some extent due to the phase difference between the first audio signal and the second audio signal, so that other people cannot easily hear the related content in the first audio signal and the second audio signal.

Referring to fig. 8, in some embodiments, taking a mobile phone as an example, the first sound outlet 104 is located on the front surface of the mobile phone and near the edge of the front surface; the second sound outlet 106 is located on the side surface 100 b. Correspondingly, the first sound outlet 104 is disposed at the middle of the edge of the front surface, and the second sound outlet 106 is correspondingly disposed at the middle of the side surface 100 b. When a user performs operations such as a call and a voice chat using the device 10, the front edge is habitually brought close to the ear when the user picks up the device 10, according to the usage habits of many users. Based on this, the position of the first sound outlet 104 is arranged in the middle of the edge of the front face, which can conform to the use habit of the user; the second sound outlet 106 located on the side surface 100b is not easily blocked by the head or fingers of the user, so that the second audio signal can be conveniently emitted, thereby improving the communication experience of the user.

Referring to fig. 9 to 11 simultaneously, in another device 10 provided in the embodiment of the present application, unlike the above-mentioned device, the first sound emitting element 110 and the second sound emitting element 120 of the device 10 are oriented differently. The sound emitting surface 112 of the first sound emitting element 110 faces the first surface 100a, and the sound emitting surface 112 of the second sound emitting element 120 faces the second surface 100 c. The first sound outlet 104 and the second sound outlet 106 are spaced apart from each other on the side surface 100b of the device in accordance with the positional relationship between the first sound emitting element 110 and the second sound emitting element 120. Based on this, neither the first audio signal radiated to the free space through the first sound outlet 104 nor the second audio signal radiated to the free space through the second sound outlet 106 is easily blocked.

In some other embodiments, the first sound outlet is located between the first face and the side face, i.e. the first sound outlet is located at a corner formed by the first face and the side face. The second sound outlet is located between the second face 100c and the side face 100b, i.e. the first sound outlet is located at a corner formed by the second face and the side face. Based on this, it is also possible to reduce the possibility that the first and second sound outlets are blocked by the user, so as to transmit the first and second audio signals correspondingly.

Referring to fig. 11, in some embodiments, the distance between the first sound outlet 104 and the second sound outlet 106 is 3mm to 30 mm. It should be understood that this distance refers to the shortest distance/straight distance between first sound outlet 104 and second sound outlet 106; alternatively, the distance refers to the shortest distance/straight distance between the center point of the first sound outlet 104 and the center point of the second sound outlet 106.

Such as: the distance between the first sound outlet 104 and the second sound outlet 106 is 3mm, 6mm, 9mm, 12mm, 15mm, 18mm, 21mm, 24mm, 27mm or 30 mm. It should be understood that, by designing the distance between the first sound outlet 104 and the second sound outlet 106, it can be ensured that the first audio signal and the second audio signal can generate fresnel diffraction, interference, and other related physical phenomena in the near field, so as to enhance the presentation effect of the first audio signal and the second audio signal in the near field, and facilitate the listening of a user. In the far field, the first audio signal and the second audio signal cancel each other to some extent due to the phase difference between the first audio signal and the second audio signal, so that other people cannot easily hear the related content in the first audio signal and the second audio signal.

Referring to fig. 11, in some embodiments, taking a mobile phone as an example, the first sound outlet 104 is located between the front surface and the side surface 100b of the mobile phone; the second sound outlet 106 is located between the back surface and the side surface 100 b. When the user uses the device 10 to perform operations such as conversation and voice chat, the user's fingers do not easily grip the positions of the first sound outlet 104 and the second sound outlet 106 when the user picks up the device 10 according to the usage habits of most users. Based on this, the positions of the first sound outlet 104 and the second sound outlet 106 can reduce the possibility of being blocked by the user, and the emission of the first audio signal and the second audio signal can be facilitated, so as to improve the communication experience of the user.

Referring to fig. 12, in some embodiments, the apparatus 10 may further include a processing circuit 200, wherein the processing circuit 200 is electrically connected to the first sound generating element 110 and the second sound generating element 120, respectively. The Processing circuit may be a DSP (Digital Signal Processing) chip; alternatively, the processing circuit may be another circuit or chip for audio processing. Based on this, when the processing circuit 200 receives the electrical signal containing a call, a voice chat, etc., corresponding amplitude difference and phase difference may be applied to different frequency components in the frequency spectrum according to the frequency spectrum of the electrical signal to separate into the first electrical signal and the second electrical signal. Thus, the first electrical signal is transmitted to the first sound emitting element 110, and the second electrical signal is transmitted to the second sound emitting element 120; the first sound emitting element 110 may emit a first audio signal and the second sound emitting element 120 may emit a second audio signal corresponding to the two electrical signals of the processing circuit. It should be understood that the application of corresponding amplitude and phase differences to the electrical signals may be adjusted by the developer based on the structure, experiment, simulation, and hardware configuration of the apparatus 10; the present application is not limited to this as long as the combined action of the amplitude difference and the phase difference can make the first audio signal and the second audio signal cancel each other in the far field.

It should be understood that the device 10 of various embodiments may also be provided with other sound producing elements in order to enhance the playback and stereo effects of the audio signals emitted by the device 10. Such as: like the first sound emitting element 110 and the second sound emitting element 120, the device 10 of each embodiment may further include a third sound emitting element and a fourth sound emitting element that cooperate; alternatively, the device 10 of each embodiment may further include a fifth sound emitting element used alone, which is not limited thereto.

In some embodiments, the first sound emitting element 110 and the second sound emitting element 120 may both be receivers (RCV, Receiver); that is, the first sound emitting element 110 and the second sound emitting element 120 are both earpieces of the device 10. For example, when the user uses the device 10 to perform a conversation or the like, based on the cooperation of the first sound emitting element 110, the second sound emitting element 120 and the casing 100, the user can more smoothly obtain the related content in the first audio signal and the second audio signal, so as to improve the chat experience of the user. In addition, interference to other people around can be reduced, and the possibility that related privacy information is leaked can be reduced.

In other embodiments, the first sound emitting element 110 and the second sound emitting element 120 may both be speakers (SPK, Speaker). For example, when the user uses the device 10 of each embodiment to perform operations such as voice chat or music playing, the user may select to play the sound through the speaker to receive and hear related information within a certain range based on the cooperation of the first sound emitting element 110, the second sound emitting element 120 and the housing 100. And other people far away from the user are not easy to listen to the related audio signals, so that the chat experience or music listening experience of the user is improved.

In other embodiments, one of the first sound generating element 110 and the second sound generating element 120 is a receiver, and the other is a speaker. Such as: the first sound generating element 110 is a receiver, and the second sound generating element 120 is a speaker. It should be understood that in this embodiment, the receiver may be adjusted by equalization, gain, filtering, etc. to make the receiver and the speaker have the same or substantially the same frequency, amplitude, phase, etc. acoustic properties, so as to improve the user's chat experience or music listening experience.

While the foregoing is directed to embodiments of the present application, it will be appreciated by those skilled in the art that various changes and modifications may be made without departing from the principles of the application, and it is intended that such changes and modifications be covered by the scope of the application.