阅读说明：本技术 无线麦克风对频系统及方法 (Wireless microphone frequency alignment system and method ) 是由 黄勤 卢鹃玲 于 2020-06-01 设计创作，主要内容包括：本发明提供一种无线麦克风对频系统及方法,包括：无线音频接收终端及无线麦克风,首先通过无线音频接收终端的频率旋转或按钮进行频率选择,通过对频模式开关按键进入对频模式,无线音频接收终端会通过发声装置播放包含对频信息的音频信号；打开无线麦克风的对频开关按键,无线麦克风的拾音器会接收包含对频信息的音频信号并进行声波解码得到频率信息,无线麦克风调整发射频率并且发送确认信息至无线音频接收终端,无线音频接收终端收到确认信息后对频结束。本发明的无线麦克风对频系统及方法通过无线音频接收终端的发声装置和无线话筒中的拾音器来实现对频信息的传递,以此简化操作、减小产品成本。(The invention provides a wireless microphone frequency alignment system and a wireless microphone frequency alignment method, which comprise the following steps: the wireless audio receiving terminal and the wireless microphone firstly carry out frequency selection through frequency rotation or buttons of the wireless audio receiving terminal, enter a frequency alignment mode through a frequency alignment mode switch key, and play an audio signal containing frequency alignment information through a sound generating device; and turning on a frequency alignment switch key of the wireless microphone, receiving an audio signal containing frequency alignment information by a sound pickup of the wireless microphone, performing sound wave decoding to obtain frequency information, adjusting the frequency of transmission by the wireless microphone, sending confirmation information to the wireless audio receiving terminal, and finishing frequency alignment after the wireless audio receiving terminal receives the confirmation information. The wireless microphone frequency-alignment system and the method realize the transmission of frequency-alignment information through the sound generating device of the wireless audio receiving terminal and the sound pickup in the wireless microphone, thereby simplifying the operation and reducing the product cost.)

1. A wireless microphone frequency alignment system, comprising at least:

the wireless audio receiving terminal comprises a wireless receiver, a sound generating device and a frequency setting module, and the wireless microphone comprises a sound pickup and a wireless transmitter; wherein the content of the first and second substances,

the wireless receiver is connected with the frequency setting module and carries out sound wave coding according to the frequency control signal output by the frequency setting module; receiving a frequency-pairing feedback signal sent by the wireless transmitter, and confirming that the frequency pairing is completed;

the sound generating device is connected with the wireless receiver and plays an audio signal with a set frequency according to an output signal of the wireless receiver;

the sound pickup collects the sound played by the sound production device and restores the sound to obtain a counter frequency sound wave signal;

the wireless transmitter is connected with the sound pickup to obtain a target frequency corresponding to the frequency-matching sound wave signal, and the frequency-matching feedback signal is sent at the target frequency.

2. The wireless microphone frequency alignment system of claim 1, wherein: the frequency setting module comprises a frequency adjusting knob or a frequency adjusting key.

3. The wireless microphone frequency alignment system of claim 1, wherein: the wireless receiver comprises a wireless receiving unit and an acoustic wave coding unit; the wireless receiving unit receives a signal sent by the wireless transmitter; the sound wave coding unit is connected with the frequency setting module and the output signal of the wireless receiving unit and carries out sound wave coding of the set frequency according to the frequency control signal.

4. The wireless microphone frequency-alignment system according to claim 1 or 3, wherein: the wireless audio receiving terminal also comprises a display screen which is connected with the wireless receiver to display the set frequency.

5. The wireless microphone frequency alignment system of claim 1, wherein: the wireless audio receiving terminal also comprises a first frequency-matching switch; the first frequency-pairing switch is connected with the frequency setting module to realize the on and off of a frequency-pairing mode.

6. The wireless microphone frequency alignment system of claim 1, wherein: the sound generating device comprises a loudspeaker; or the sound generating device comprises a power amplifier and a loudspeaker, and the power amplifier is connected to the input end of the loudspeaker.

7. The wireless microphone frequency alignment system of claim 6, wherein: the wireless microphone collects human voice signals and sends the human voice signals to the wireless audio receiving terminal; the wireless audio receiving terminal also comprises an audio processing module, the audio processing module is connected between the wireless receiver and the sound generating device and receives audio signals, and the human voice signals and the audio signals are respectively subjected to audio processing and combined.

8. The wireless microphone frequency alignment system of claim 1, wherein: the sound production device comprises a buzzer.

9. The wireless microphone frequency alignment system of claim 1, wherein: the wireless microphone further comprises a second frequency-pair switch, and the second frequency-pair switch is connected with the wireless transmitter to realize the on-off of a frequency-pair mode.

10. The wireless microphone frequency alignment system of claim 1 or 9, wherein: the wireless transmitter comprises an acoustic wave decoding unit and a wireless transmitting unit; the sound wave decoding unit receives the frequency-opposite sound wave signals and decodes the frequency-opposite sound wave signals to obtain the target frequency; the wireless sending unit is connected with the sound wave decoding unit, adjusts the transmitting frequency to the target frequency, and sends the frequency-matching feedback signal.

11. A wireless microphone frequency alignment method, characterized in that the wireless microphone frequency alignment method at least comprises:

in the frequency alignment mode: the wireless audio receiving terminal plays an audio signal with a set frequency;

the wireless microphone collects sound played by the wireless audio receiving terminal, obtains a frequency-opposite sound wave signal, decodes the frequency-opposite sound wave signal to obtain a corresponding target frequency, and sends a frequency-opposite feedback signal at the target frequency;

and if the wireless audio receiving terminal receives the frequency alignment feedback signal, finishing frequency alignment, and if the frequency alignment feedback signal is not received, continuously playing the audio signal with the set frequency by the wireless audio receiving terminal until the frequency alignment feedback signal is received.

12. The wireless microphone frequency-aligning method of claim 11, wherein: the wireless microphone frequency-aligning method further comprises opening a frequency-aligning switch before frequency-aligning to start a frequency-aligning mode.

13. The wireless microphone frequency-aligning method of claim 11, wherein: the frequency alignment method of the wireless microphone specifically comprises the steps of setting the set frequency through a frequency adjusting knob or a frequency adjusting key and displaying the set frequency through a display screen.

14. The wireless microphone frequency alignment method according to any one of claims 11 to 13, wherein: the wireless microphone frequency alignment method further comprises the following steps of in a Karaoke mode: the wireless microphone collects the voice signals and sends the voice signals to the wireless audio receiving terminal, and the wireless audio receiving terminal receives the voice signals and the sound source signals and plays the voice signals and the sound source signals after sound effect processing and combination are respectively carried out.

Technical Field

The invention relates to the field of audio frequency, in particular to a wireless microphone frequency alignment system and a wireless microphone frequency alignment method.

Background

Karaoke is an accompaniment system in which a singer can participate in song singing with pre-recorded musical accompaniment, and karaoke enables the voice of the singer to be beautified and embellished through sound processing, and the voice of the singer becomes a muddy integral song when organically combined with the musical accompaniment. The wireless karaoke means that audio signals of a singer are collected by a wireless microphone and transmitted to a karaoke host computer in a wireless transmission mode, and the wireless karaoke host computer is mostly used in KTV or households.

In order to avoid signal interference, i.e. cross-frequency, the same and unique frequency must be set between the transmitter and the receiver of the wireless microphone system in a local range, and the following methods are generally used when performing frequency matching between the transmitter and the receiver of the existing wireless microphone: one is a manual adjustment mode, and the specific process is that the frequency of the receiver is firstly set by adjusting a key on the receiver, then the frequency of the transmitter is adjusted to the same frequency as the receiver by the key on the transmitter, and then the frequency alignment between the transmitter and the receiver is completed, and the mode needs that display screens are arranged on the transmitter and the receiver to display frequency band information; the other is an infrared frequency alignment mode, and the specific process is that the frequency of the receiver is set by adjusting a key on the receiver, then the transmitter is close to the receiver at a certain angle to a preset range, and the frequency alignment between the receiver and the transmitter is completed through an infrared transmitter on the receiver and an infrared receiver on the transmitter.

The first frequency matching mode needs to manually adjust the frequency values of the receiver and the transmitter, is complex to operate, needs a display screen for both receiving and transmitting, and is high in product cost; the second frequency-matching method requires additional infrared receiving and transmitting devices, and also has the problem of high product cost. Therefore, how to implement frequency matching between a transmitter and a receiver of a wireless microphone on the basis of simplifying operation and reducing cost becomes one of the problems to be solved by those skilled in the art.

Disclosure of Invention

In view of the above drawbacks of the prior art, an object of the present invention is to provide a wireless microphone frequency matching system and method, which are used to solve the problems of complex operation and high cost of the wireless microphone frequency matching system in the prior art.

To achieve the above and other related objects, the present invention provides a wireless microphone frequency-alignment system, which at least comprises:

the wireless audio receiving terminal comprises a wireless receiver, a sound generating device and a frequency setting module, and the wireless microphone comprises a sound pickup and a wireless transmitter; wherein the content of the first and second substances,

the wireless receiver is connected with the frequency setting module and carries out sound wave coding according to the frequency control signal output by the frequency setting module; receiving a frequency-pairing feedback signal sent by the wireless transmitter, and confirming that the frequency pairing is completed;

the sound generating device is connected with the wireless receiver and plays an audio signal with a set frequency according to an output signal of the wireless receiver;

the sound pickup collects the sound played by the sound production device and restores the sound to obtain a counter frequency sound wave signal;

the wireless transmitter is connected with the sound pickup to obtain a target frequency corresponding to the frequency-matching sound wave signal, and the frequency-matching feedback signal is sent at the target frequency.

Optionally, the frequency setting module includes a frequency adjustment knob or a frequency adjustment key.

Optionally, the wireless receiver includes a wireless receiving unit and an acoustic wave encoding unit; the wireless receiving unit receives a signal sent by the wireless transmitter; the sound wave coding unit is connected with the frequency setting module and the output signal of the wireless receiving unit and carries out sound wave coding of the set frequency according to the frequency control signal.

More optionally, the wireless audio receiving terminal further includes a display screen, and the display screen is connected to the wireless receiver to display the set frequency.

Optionally, the wireless audio receiving terminal further comprises a first frequency-to-frequency switch; the first frequency-pairing switch is connected with the frequency setting module to realize the on and off of a frequency-pairing mode.

Optionally, the sound emitting device comprises a speaker; or the sound generating device comprises a power amplifier and a loudspeaker, and the power amplifier is connected to the input end of the loudspeaker.

More optionally, the wireless microphone collects a human voice signal and sends the human voice signal to the wireless audio receiving terminal; the wireless audio receiving terminal also comprises an audio processing module, the audio processing module is connected between the wireless receiver and the sound generating device and receives audio signals, and the human voice signals and the audio signals are respectively subjected to audio processing and combined.

Optionally, the sound emitting device comprises a buzzer.

Optionally, the wireless microphone further comprises a second frequency-alignment switch, and the second frequency-alignment switch is connected to the wireless transmitter to enable the frequency-alignment mode to be turned on and off.

More optionally, the wireless transmitter includes an acoustic wave decoding unit and a wireless transmitting unit; the sound wave decoding unit receives the frequency-opposite sound wave signals and decodes the frequency-opposite sound wave signals to obtain the target frequency; the wireless sending unit is connected with the sound wave decoding unit, adjusts the transmitting frequency to the target frequency, and sends the frequency-matching feedback signal.

To achieve the above and other related objects, the present invention also provides a wireless microphone frequency aligning method, which at least includes:

in the frequency alignment mode: the wireless audio receiving terminal plays an audio signal with a set frequency;

the wireless microphone collects sound played by the wireless audio receiving terminal, obtains a frequency-opposite sound wave signal, decodes the frequency-opposite sound wave signal to obtain a corresponding target frequency, and sends a frequency-opposite feedback signal at the target frequency;

and if the wireless audio receiving terminal receives the frequency alignment feedback signal, finishing frequency alignment, and if the frequency alignment feedback signal is not received, continuously playing the audio signal with the set frequency by the wireless audio receiving terminal until the frequency alignment feedback signal is received.

Optionally, the wireless microphone frequency-aligning method further comprises opening a frequency-aligning switch before frequency-aligning to turn on a frequency-aligning mode.

Optionally, the frequency alignment method of the wireless microphone specifically includes setting the set frequency through a frequency adjustment knob or a frequency adjustment key, and displaying the set frequency through a display screen.

More optionally, the wireless microphone frequency alignment method further includes, in the karaoke mode: the wireless microphone collects the voice signals and sends the voice signals to the wireless audio receiving terminal, and the wireless audio receiving terminal receives the voice signals and the sound source signals and plays the voice signals and the sound source signals after sound effect processing and combination are respectively carried out.

As described above, the wireless microphone frequency matching system and method of the present invention have the following beneficial effects:

the wireless microphone frequency-alignment system and the method realize the transmission of frequency-alignment information through the sound generating device of the wireless audio receiving terminal and the sound pickup in the wireless microphone, thereby simplifying the operation and reducing the product cost.

Drawings

Fig. 1 is a schematic structural diagram of a wireless microphone frequency-matching system according to the present invention.

Fig. 2 is a schematic circuit diagram of a wireless receiver according to the present invention.

FIG. 3 is a schematic circuit diagram of the sound effect processing module according to the present invention.

Fig. 4 is a schematic circuit diagram of a wireless transmitter according to the present invention.

Fig. 5 is a schematic structural diagram of a wireless microphone frequency alignment system according to another embodiment of the present invention.

Description of the element reference numerals

1 Wireless audio receiving terminal

11 frequency setting module

121 loudspeaker

122 power amplifier

123 buzzer

13 radio receiver

131 radio receiving unit

132 sonic wave encoding unit

14 display screen

15 first frequency-pair switch

16 sound effect processing module

161 first sound effect processing unit

162 second sound effect processing unit

163 merging unit

2 Wireless microphone

21 sound pickup

22 radio transmitter

221 acoustic wave decoding unit

222 radio transmitting unit

23 second frequency-pair switch

24 power supply

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.

Please refer to fig. 1 to 5. It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.

Example one

As shown in fig. 1, the present embodiment provides a wireless microphone frequency-alignment system, which includes:

wireless audio frequency receiving terminal 1 and wireless microphone 2, wireless audio frequency receiving terminal 1 includes frequency setting module 11, sound generating mechanism and wireless receiver 13, wireless microphone 2 includes adapter 21 and wireless transmitter 22.

As shown in fig. 1, the frequency setting module 11 is connected to the wireless receiver 13, and is configured to output a frequency control signal.

Specifically, the frequency setting module 11 includes, but is not limited to, a frequency adjusting knob or a frequency adjusting button, and any device capable of achieving frequency setting is suitable for the present invention. In this embodiment, the frequency setting module 11 is implemented by using a frequency adjusting knob, and the frequency is adjusted by rotating the knob.

As shown in fig. 1, the wireless receiver 13 is connected to the frequency setting module 11, and performs sound wave encoding according to the frequency control signal output by the frequency setting module 11; and receives a frequency pairing feedback signal sent by the wireless transmitter 22 to confirm that the frequency pairing is completed.

Specifically, as shown in fig. 2, in the present embodiment, the wireless receiver 13 includes a wireless receiving unit 131 and an acoustic wave encoding unit 132. The wireless receiving unit 131 receives signals sent by the wireless transmitter 22 in the wireless microphone 2, including but not limited to the audio feedback signal and the human voice signal collected by the microphone, and the wireless receiver 13 and the wireless transmitter 22 perform wireless communication when the frequencies are the same. The sound wave encoding unit 132 is connected to the output signals of the frequency setting module 11 and the wireless receiving unit 131, and performs sound wave encoding with a set frequency according to the frequency control signal to obtain a corresponding audio signal.

As shown in fig. 1, as an implementation manner of the present invention, the wireless audio receiving terminal 1 further includes a display screen 14, where the display screen 14 is connected to the wireless receiver 13 to display the frequency adjusted by the frequency setting module 11, and further determine that the frequency adjusted by the frequency setting module 11 is the set frequency. In practical use, a frequency can be set as a set frequency at will, and the frequencies of the wireless audio receiving terminal 1 and the wireless microphone 2 are opposite, and at this time, the display 14 is not required to be set, which is not limited to this embodiment.

As shown in fig. 1, the sound generating device is used for playing an audio signal and outputting sound.

Specifically, as an example, the sound generating device includes a speaker 121. As another example, the sound generating apparatus further includes a power amplifier 122, where the power amplifier 122 is connected to an input end of the speaker 121, and amplifies the received signal and outputs the amplified signal to the speaker 121.

As shown in fig. 1, as an implementation manner of the present invention, the wireless audio receiving terminal 1 further includes a first frequency switch 15, where the first frequency switch 15 is connected to the frequency setting module 11; when the first frequency switch 15 is turned on, the frequency setting module 11 may be configured to set a set frequency; when the first frequency-to-frequency switch 15 is turned off, the set frequency set by the frequency setting module 11 does not act on the next stage of circuit; to enable the switching on and off of the frequency mode.

As shown in fig. 1, as an implementation manner of the present invention, the wireless audio receiving terminal 1 further includes a sound effect processing module 16, and the sound effect processing module 16 is connected between the wireless receiver 13 and the sound generating device and receives a sound source signal. The sound effect processing module 16 performs sound effect processing on the signal output by the wireless receiver 13 and the sound source signal respectively and combines the processed signals.

Specifically, as shown in FIG. 3, in the present embodiment, the sound effect processing module 16 includes a first sound effect processing unit 161, a second sound effect processing unit 162 and a merging unit 163. The first sound effect processing unit 161 receives the output signal of the wireless receiver 13, and performs sound effect processing on the output signal of the wireless receiver 13. The second sound effect processing unit 162 receives the sound source signal, and performs sound effect processing on the sound source signal. The merging unit 163 is connected to the first sound processing unit 161 and the second sound processing unit 162, and merges and outputs the output signals of the first sound processing unit 161 and the second sound processing unit 162. The first sound effect processing unit 161 and the second sound effect processing unit 162 include but are not limited to sound effects such as high pitch, low pitch, variable sound, and the like, which are not described herein in detail.

Specifically, the sound source signal includes, but is not limited to, an accompaniment, and any sound source signal that can be combined with a human voice signal collected by a wireless microphone to increase an audio effect is suitable for the present invention.

As shown in fig. 1, the sound pickup 21 is used for sound collection.

Specifically, the sound pickup 21 collects the sound played by the sound generating device, and restores the sound to obtain a counter frequency sound wave signal. As an example, the sound pickup 21 also collects human voice to realize functions of singing karaoke and the like.

As shown in fig. 1, the wireless transmitter 22 is connected to the sound pickup 21, obtains a target frequency corresponding to the frequency-aligned sound wave signal, and transmits the frequency-aligned feedback signal at the target frequency.

Specifically, as shown in fig. 4, in the present embodiment, the wireless transmitter 22 includes an acoustic wave decoding unit 221 and a wireless transmitting unit 222. The sound wave decoding unit 221 receives the frequency-opposite sound wave signal, and decodes the frequency-opposite sound wave signal to obtain the target frequency. The wireless transmitting unit 222 is connected to the sound wave decoding unit, adjusts the transmitting frequency to the target frequency, and transmits the frequency feedback signal. And if the wireless receiver 13 in the wireless audio receiving terminal 1 receives the frequency alignment feedback signal, the frequency alignment is successful, otherwise, the frequency alignment operation is continued.

As shown in fig. 1, as an implementation manner of the present invention, the wireless microphone 2 further includes a second opposite-frequency switch 23, where the second opposite-frequency switch 23 is connected to the wireless transmitter 22; when the second frequency-to-frequency switch 23 is turned on, the sound wave decoding unit 221 decodes and obtains the target frequency; when the second frequency-to-frequency switch 23 is turned off, the sound wave decoding unit 221 is not used for decoding to obtain the target frequency; to enable the switching on and off of the frequency mode.

As shown in fig. 1, as an implementation manner of the present invention, the wireless microphone 2 further includes a power supply 24, which is not described in detail herein.

The wireless microphone frequency-alignment system realizes the transmission of frequency-alignment information through the sound production device of the wireless audio receiving terminal and the sound pickup in the wireless microphone, thereby simplifying the operation and reducing the product cost.

Example two

As shown in fig. 5, the present embodiment provides a wireless microphone frequency matching system, which is different from the first embodiment in that, considering that the power of some receiving end sounding systems is relatively large, and the volume may be too large for sound wave matching, the present embodiment sets the sounding device as a buzzer, and an audio signal with a set frequency is played through the buzzer.

Specifically, the buzzer 123 is connected to the wireless receiver 13, and when the wireless audio receiving terminal 1 enters a frequency-matching mode, the buzzer 123 makes a sound based on the set frequency, so as to transmit a frequency-matching signal. At this time, the speaker 121 is not used to deliver the audio signal.

EXAMPLE III

In this embodiment, the frequency alignment method of the wireless microphone is implemented based on the frequency alignment system of the first embodiment, and in practical use, any device capable of implementing the frequency alignment method of the wireless microphone of the present invention is applicable. The wireless microphone frequency alignment method comprises the following steps:

1) in the frequency alignment mode: the wireless audio receiving terminal plays the audio signal with the set frequency.

Specifically, the frequency setting module 11 (including but not limited to a frequency adjustment knob or a frequency adjustment key) is used for selecting the frequency, the wireless receiver 13 is used for performing sound wave coding based on the set frequency, the display screen 14 is used for displaying the set frequency so as to select the set frequency, and the sound generating device is used for automatically and continuously playing the audio signal with the set frequency based on the output signal of the wireless receiver 13.

2) The wireless microphone collects sound played by the wireless audio receiving terminal, obtains a frequency-opposite sound wave signal, decodes the frequency-opposite sound wave signal to obtain a corresponding target frequency, and sends a frequency-opposite feedback signal at the target frequency.

Specifically, the sound pickup 21 in the wireless microphone 2 receives the audio signal sent by the wireless audio receiving terminal 1 and obtains a counter frequency sound wave signal, the counter frequency sound wave signal is sent to the wireless transmitter 22, the wireless transmitter 22 decodes the received counter frequency sound wave signal to obtain a target frequency, the transmitting frequency of the wireless transmitter 22 is adjusted to be consistent with the target frequency, and then counter frequency feedback information is sent to the wireless audio receiving terminal 1.

As an implementation manner of the present invention, the method further includes opening a frequency-pairing switch before the frequency-pairing to start the frequency-pairing mode. As an example, before setting the set frequency, the first frequency-pairing switch 15 is opened to start the frequency-pairing step; as another example, the first frequency-pairing switch 15 is turned on after the set frequency is set to turn on the frequency-pairing step. As an example, the second counter-frequency switch 23 is turned on before the wireless microphone 2 collects the audio signal played by the wireless audio receiving terminal 1. In specific use, the corresponding frequency-matching switches can be turned on as required, which is not described herein.

3) And if the wireless audio receiving terminal receives the frequency alignment feedback signal, finishing frequency alignment, and if the frequency alignment feedback signal is not received, continuously playing the audio signal with the set frequency by the wireless audio receiving terminal until the frequency alignment feedback signal is received.

Specifically, when the wireless audio receiving terminal 1 receives the frequency alignment feedback signal of the wireless microphone 2, it is determined that the frequency alignment is successful, otherwise, the frequency alignment is not successful.

As an implementation manner of the present invention, the method further includes, in the karaoke mode: the wireless microphone 2 collects voice signals and sends the voice signals to the wireless audio receiving terminal 1, and the wireless audio receiving terminal 1 receives the voice signals and sound source signals and plays the voice signals and the sound source signals after sound effects are processed and combined respectively.

In summary, the present invention provides a system and a method for wireless microphone frequency alignment, including: the wireless audio receiving terminal comprises a wireless receiver, a sound generating device and a frequency setting module, and the wireless microphone comprises a sound pickup and a wireless transmitter; the wireless receiver is connected with the frequency setting module and carries out sound wave coding according to the frequency control signal output by the frequency setting module; receiving a frequency-pairing feedback signal sent by the wireless transmitter, and confirming that the frequency pairing is completed; the sound generating device is connected with the wireless receiver and plays an audio signal with a set frequency according to an output signal of the wireless receiver; the sound pickup collects the sound played by the sound production device and restores the sound to obtain a counter frequency sound wave signal; the wireless transmitter is connected with the sound pickup to obtain a target frequency corresponding to the frequency-matching sound wave signal, and the frequency-matching feedback signal is sent at the target frequency. Firstly, frequency selection is carried out through frequency rotation or buttons of the wireless audio receiving terminal, the frequency matching mode is entered through a frequency matching mode switch key, and the wireless audio receiving terminal can play audio signals containing frequency matching information through a sound generating device. And turning on a frequency alignment switch key of the wireless microphone, receiving an audio signal containing frequency alignment information by a sound pickup of the wireless microphone, performing sound wave decoding to obtain frequency information, adjusting the frequency of transmission by the wireless microphone, sending confirmation information to the wireless audio receiving terminal, and finishing frequency alignment after the wireless audio receiving terminal receives the confirmation information. The wireless microphone frequency-alignment system and the method realize the transmission of frequency-alignment information through the sound generating device of the wireless audio receiving terminal and the sound pickup in the wireless microphone, thereby simplifying the operation and reducing the product cost. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.