阅读说明：本技术 一种麦克风声场切换装置 (Microphone sound field switching device ) 是由 麦启斌 林世权 于 2021-08-03 设计创作，主要内容包括：本发明公开了一种麦克风声场切换装置,属于音频处理技术领域,包括前麦克风放大模块、后麦克风放大模块、左麦克风放大模块以及右麦克风放大模块,所述前麦克风放大模块的输出端对应设置有切换开关一,所述后麦克风放大模块的输出端对应设置有切换开关二,所述左麦克风放大模块的输出端对应设置有切换开关三,所述右麦克风放大模块的输出端对应设置有切换开关四。该麦克风声场切换装置,通过对不同方位的声源基于定位技术进行实时定位,确定声源的具体方位,并反馈给声场切换模块,声场切换模块根据反馈信息连接麦克风放大模块,解决了现有的声场电路,音源拾取方向性单一,无法准确辩别音源来自何方,丢失更多的声音细节等问题。(The invention discloses a microphone sound field switching device, which belongs to the technical field of audio processing and comprises a front microphone amplification module, a rear microphone amplification module, a left microphone amplification module and a right microphone amplification module, wherein the output end of the front microphone amplification module is correspondingly provided with a first change-over switch, the output end of the rear microphone amplification module is correspondingly provided with a second change-over switch, the output end of the left microphone amplification module is correspondingly provided with a third change-over switch, and the output end of the right microphone amplification module is correspondingly provided with a fourth change-over switch. The microphone sound field switching device is used for positioning sound sources in different directions in real time based on a positioning technology, determining the specific directions of the sound sources and feeding the sound sources back to the sound field switching module, and the sound field switching module is connected with the microphone amplification module according to feedback information, so that the problems that the existing sound field circuit is single in sound source pickup directivity, the sound source is from which direction cannot be accurately distinguished, more sound details are lost and the like are solved.)

1. A microphone sound field switching device comprises a front microphone amplification module, a rear microphone amplification module, a left microphone amplification module and a right microphone amplification module, and is characterized in that the output end of the front microphone amplification module is correspondingly provided with a first change-over switch, the output end of the rear microphone amplification module is correspondingly provided with a second change-over switch, the output end of the left microphone amplification module is correspondingly provided with a third change-over switch, and the output end of the right microphone amplification module is correspondingly provided with a fourth change-over switch;

the output ends of the four change-over switches are electrically connected with a sound field switching module, two connecting contact pieces are arranged inside the sound field switching module, one output end of the sound field switching module is connected with the input end of a positioning preprocessing module, the output end of the positioning preprocessing module is connected with the input end of a sound source direction positioning module, the output end of the sound source direction positioning module is connected with the input end of a sound source direction feedback module, and the output end of the sound source direction feedback module is connected with the input end of the sound field switching module;

the positioning preprocessing module is used for amplifying and denoising audio signals picked up by the microphone amplifying modules from four different directions; the sound source direction positioning module is used for calculating the picked audio signals based on a sound source positioning algorithm and determining the sound source direction in real time according to the frequency of the audio signals appearing in four directions in a specified time period; the sound source direction feedback module is used for feeding back the sound source direction obtained by the sound source direction positioning module;

the other output end of the sound field switching module is connected with the input end of the filtering module, the output end of the filtering module is connected with the input end of the audio amplification module, and the output end of the audio amplification module is connected with the input end of the audio output module.

2. The microphone sound field switching device according to claim 1, wherein the first switch, the second switch, the third switch and the fourth switch can be based on a physical switch device, an electronic switch device, a software programming control switch or a mixture of the three switch types to switch microphones with different orientations in real time.

3. The microphone sound field switching device of claim 1, wherein the two connection contacts inside the sound field switching module correspond to two sets of switches respectively, one set of switches is a first switch and a second switch, and the other set of switches is a third switch and a fourth switch, and are used for picking up sound sources in two directions.

4. The microphone sound field switching device of claim 1, wherein a power supply module is disposed inside the microphone sound field switching device, and the power supply module is used for supplying power to the whole microphone sound field switching device.

5. The microphone sound field switching device according to claim 1, wherein when the microphone sound field switching device performs sound source localization, the method comprises the following specific steps:

s1, the four microphone amplification modules pick up sound sources at the same time, and the corresponding change-over switches of the four microphone amplification modules are turned on at the same time;

s2, two connecting contact pieces in the sound field switching module electrically connect the four switches in sequence to pick up sound sources in different directions;

s3, the positioning preprocessing module performs amplification and noise reduction processing on sound sources picked up by the microphone amplification modules from four different directions;

s4, the sound source direction positioning module determines the sound source direction in real time according to the frequency of the audio signals appearing in the four directions in a specified time interval;

and S5, feeding back the determined sound source direction by the sound source direction feedback module.

6. The microphone sound field switching device of claim 5, wherein in S2, two sets of connecting contacts alternately connect two sets of switches to pick up sound sources in different directions.

7. A microphone acoustic field switching apparatus according to claim 6, wherein the two sets of connection pads are connected alternately to the two sets of switches for the same connection duration for each orientation of the switches, so as to ensure the accuracy of the picked-up frequency in the subsequent calculation.

8. The microphone sound field switching device according to claim 1, wherein the microphone sound field switching device comprises the following specific steps when switching in real time:

a1, the sound field switching module connects the internal connection contact to the corresponding switches of the microphone amplification modules in two directions according to the feedback positioning information;

a2, after being processed by the filtering module, the audio frequency amplifying module amplifies the audio frequency;

and A3, finally, outputting the sound source by the audio output module to complete the real-time switching process.

9. The microphone sound field switching device of claim 8, wherein in the A1, when the internal connection contact is connected to the corresponding switch of the microphone amplification module in two orientations, the switch can be switched manually, or the corresponding switch button can be pressed to switch electronically, or the switch can be controlled based on software programming.

Technical Field

The invention belongs to the technical field of audio processing, and particularly relates to a microphone sound field switching device.

Background

In the prior art, a microphone device on the market is a traditional single sound field device, and sound recovery is performed by picking up a sound signal with single sound. However, the conversion efficiency of the whole circuit is not high, the sound source in the sound field has single picking-up direction, more sound details are easy to lose, the sound source is easy to be influenced by the change of temperature, environment and high-frequency strong magnetic interference, and misoperation is easy to occur.

In order to solve the above problems, we propose a microphone sound field switching device.

Disclosure of Invention

In view of the deficiencies of the prior art, the present invention provides a microphone sound field switching device to solve the problems in the background art.

In order to achieve the purpose, the invention provides the following technical scheme: a microphone sound field switching device comprises a front microphone amplification module, a rear microphone amplification module, a left microphone amplification module and a right microphone amplification module, wherein the output end of the front microphone amplification module is correspondingly provided with a first change-over switch, the output end of the rear microphone amplification module is correspondingly provided with a second change-over switch, the output end of the left microphone amplification module is correspondingly provided with a third change-over switch, and the output end of the right microphone amplification module is correspondingly provided with a fourth change-over switch;

the output ends of the four change-over switches are electrically connected with a sound field switching module, two connecting contact pieces are arranged inside the sound field switching module, one output end of the sound field switching module is connected with the input end of a positioning preprocessing module, the output end of the positioning preprocessing module is connected with the input end of a sound source direction positioning module, the output end of the sound source direction positioning module is connected with the input end of a sound source direction feedback module, and the output end of the sound source direction feedback module is connected with the input end of the sound field switching module;

the positioning preprocessing module is used for amplifying and denoising audio signals picked up by the microphone amplifying modules from four different directions; the sound source direction positioning module is used for calculating the picked audio signals based on a sound source positioning algorithm and determining the sound source direction in real time according to the frequency of the audio signals appearing in four directions in a specified time period; the sound source direction feedback module is used for feeding back the sound source direction obtained by the sound source direction positioning module;

the other output end of the sound field switching module is connected with the input end of the filtering module, the output end of the filtering module is connected with the input end of the audio amplification module, and the output end of the audio amplification module is connected with the input end of the audio output module.

Further optimizing the technical scheme, the first change-over switch, the second change-over switch, the third change-over switch and the fourth change-over switch can be used for switching the microphones in different directions in real time based on a physical switch device, an electronic switch device, a software programming control switch or a mixture of the three switch types.

Further optimize this technical scheme, two connection contact pieces in the sound field switching module correspond two sets of change over switch respectively, and a set of change over switch is change over switch one and change over switch two, and another group of change over switch is change over switch three and change over switch four for pick up the sound source in two directions.

Further optimizing the technical scheme, a power supply module is arranged inside the microphone sound field switching device and used for meeting the power supply requirement of the whole microphone sound field switching device.

Further optimizing the technical scheme, when the microphone sound field switching device carries out sound source positioning, the method comprises the following specific steps:

s1, the four microphone amplification modules pick up sound sources at the same time, and the corresponding change-over switches of the four microphone amplification modules are turned on at the same time;

s2, two connecting contact pieces in the sound field switching module electrically connect the four switches in sequence to pick up sound sources in different directions;

s3, the positioning preprocessing module performs amplification and noise reduction processing on sound sources picked up by the microphone amplification modules from four different directions;

s4, the sound source direction positioning module determines the sound source direction in real time according to the frequency of the audio signals appearing in the four directions in a specified time interval;

and S5, feeding back the determined sound source direction by the sound source direction feedback module.

Further optimize this technical scheme, in S2, two sets of connection contact respectively carry out the connection in turn to two sets of change over switches, pick up the sound source in different position.

Further optimizing the technical scheme, when the two groups of the connecting contact pieces are connected with the two groups of the change-over switches in turn, the connection duration time of the change-over switches in each direction is the same, and the accuracy of the picking-up frequency in the subsequent algorithm calculation is ensured.

Further optimizing the technical scheme, when the microphone sound field switching device performs real-time switching, the method comprises the following specific steps:

a1, the sound field switching module connects the internal connection contact to the corresponding switches of the microphone amplification modules in two directions according to the feedback positioning information;

a2, after being processed by the filtering module, the audio frequency amplifying module amplifies the audio frequency;

and A3, finally, outputting the sound source by the audio output module to complete the real-time switching process.

Further optimizing the technical solution, in a1, when the internal connection contact is connected to the change-over switches corresponding to the microphone amplification modules in two directions, the switch can be switched manually, or the corresponding switch button can be pressed to perform an electronic switch, or the switch can be controlled based on software programming.

Compared with the prior art, the invention provides a microphone sound field switching device, which has the following beneficial effects:

1. the microphone sound field switching device is used for positioning sound sources in different directions in real time based on a positioning technology, determining the specific directions of the sound sources and feeding the sound sources back to the sound field switching module, and the sound field switching module is connected with the microphone amplification module according to feedback information, so that the problems that the existing sound field circuit is single in sound source pickup directivity, the sound source is from which direction cannot be accurately distinguished, more sound details are lost and the like are solved.

2. The microphone sound field switching device is suitable for sound field switching in audio frequency fields such as industrial automation control, military equipment, scientific research equipment, industrial control equipment, communication equipment, medical equipment, communication equipment, night vision products, security monitoring, digital products and the like; meanwhile, the circuit is simple in structure, few in used components and small in size, high in conversion efficiency which can reach more than 98%, free of influence of environmental temperature change, strong in anti-interference performance, capable of achieving output control of change response of high-frequency strong magnetic interference, free of misoperation, low in manufacturing cost, wide in application range and good in market popularization prospect.

Drawings

Fig. 1 is a schematic system structure diagram of a microphone acoustic field switching apparatus according to the present invention;

fig. 2 is a schematic diagram of a rear sound field of the microphone sound field switching device according to the present invention;

fig. 3 is a schematic diagram of a left sound field of the microphone sound field switching device according to the present invention;

fig. 4 is a schematic diagram of a right sound field of the microphone sound field switching device according to the present invention;

fig. 5 is a circuit diagram of a system under real-time switching in the microphone acoustic field switching apparatus according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows:

referring to fig. 1, a microphone sound field switching device includes a front microphone amplification module, a rear microphone amplification module, a left microphone amplification module and a right microphone amplification module, wherein an output end of the front microphone amplification module is correspondingly provided with a first switch, an output end of the rear microphone amplification module is correspondingly provided with a second switch, an output end of the left microphone amplification module is correspondingly provided with a third switch, and an output end of the right microphone amplification module is correspondingly provided with a fourth switch;

the output ends of the four change-over switches are electrically connected with a sound field switching module, two connecting contact pieces are arranged inside the sound field switching module, one output end of the sound field switching module is connected with the input end of a positioning preprocessing module, the output end of the positioning preprocessing module is connected with the input end of a sound source direction positioning module, the output end of the sound source direction positioning module is connected with the input end of a sound source direction feedback module, and the output end of the sound source direction feedback module is connected with the input end of the sound field switching module;

the positioning preprocessing module is used for amplifying and denoising audio signals picked up by the microphone amplifying modules from four different directions; the sound source direction positioning module is used for calculating the picked audio signals based on a sound source positioning algorithm and determining the sound source direction in real time according to the frequency of the audio signals appearing in four directions in a specified time period; the sound source direction feedback module is used for feeding back the sound source direction obtained by the sound source direction positioning module;

the other output end of the sound field switching module is connected with the input end of the filtering module, the output end of the filtering module is connected with the input end of the audio amplification module, and the output end of the audio amplification module is connected with the input end of the audio output module.

Specifically, the first change-over switch, the second change-over switch, the third change-over switch and the fourth change-over switch may be used to switch microphones in different directions in real time based on a physical switch device, an electronic switch device, a software programming control switch, or a mixture of the three switch types.

Specifically, two connecting contact pieces inside the sound field switching module respectively correspond to two groups of switching switches, one group of switching switches are a first switching switch and a second switching switch, and the other group of switching switches are a third switching switch and a fourth switching switch, and are used for picking up sound sources in two directions.

Specifically, a power supply module is arranged inside the microphone sound field switching device, and the power supply module is used for meeting the power supply requirement of the whole microphone sound field switching device.

As shown in fig. 5, MIC1-MIC4 correspond to a front microphone amplification module, a rear microphone amplification module, a left microphone amplification module, and a right microphone amplification module, respectively, and SW1_ a and SW1_ B correspond to two connection contacts inside the sound field switching module, respectively. The sound fields picked up by the rear, right and left microphone amplification modules are shown in the sound field diagrams of fig. 2-4.

Example two:

when the microphone sound field switching device described in the first embodiment is used for actual operation, and when the microphone sound field switching device performs sound source localization, the method includes the following specific steps:

s1, the four microphone amplification modules pick up sound sources at the same time, and the corresponding change-over switches of the four microphone amplification modules are turned on at the same time;

s2, two connecting contact pieces in the sound field switching module electrically connect the four switches in sequence to pick up sound sources in different directions;

s3, the positioning preprocessing module performs amplification and noise reduction processing on sound sources picked up by the microphone amplification modules from four different directions;

s4, the sound source direction positioning module determines the sound source direction in real time according to the frequency of the audio signals appearing in the four directions in a specified time interval;

and S5, feeding back the determined sound source direction by the sound source direction feedback module.

In S2, two sets of connection pads are respectively connected to two sets of switches in turn to pick up sound sources in different directions.

When the two groups of the connecting contact pieces are connected with the two groups of the change-over switches in turn, the connection duration time of the change-over switches in each direction is the same, and the accuracy of the picking-up frequency in the subsequent algorithm calculation is ensured.

Example three:

when the microphone sound field switching device described in the first embodiment is used for actual operation, and when the microphone sound field switching device performs real-time switching, the method includes the following specific steps:

a1, the sound field switching module connects the internal connection contact to the corresponding switches of the microphone amplification modules in two directions according to the feedback positioning information;

a2, after being processed by the filtering module, the audio frequency amplifying module amplifies the audio frequency;

and A3, finally, outputting the sound source by the audio output module to complete the real-time switching process.

In a1, when the internal connection contact is connected to the switches corresponding to the microphone amplification modules in two directions, the switches can be switched manually, or can be switched electronically by pressing the corresponding switch button, or can be controlled based on software programming.

The data after use shows that the microphone sound field switching device has high conversion efficiency which can reach more than 98 percent, is not influenced by the change of the ambient temperature, has strong anti-interference performance, can realize the output control of the change response of the high-frequency strong magnetic interference, and does not generate false operation.

The invention has the beneficial effects that:

1. the microphone sound field switching device is used for positioning sound sources in different directions in real time based on a positioning technology, determining the specific directions of the sound sources and feeding the sound sources back to the sound field switching module, and the sound field switching module is connected with the microphone amplification module according to feedback information, so that the problems that the existing sound field circuit is single in sound source pickup directivity, the sound source is from which direction cannot be accurately distinguished, more sound details are lost and the like are solved.

2. The microphone sound field switching device is suitable for sound field switching in audio frequency fields such as industrial automation control, military equipment, scientific research equipment, industrial control equipment, communication equipment, medical equipment, communication equipment, night vision products, security monitoring, digital products and the like; meanwhile, the circuit is simple in structure, few in used components and small in size, high in conversion efficiency which can reach more than 98%, free of influence of environmental temperature change, strong in anti-interference performance, capable of achieving output control of change response of high-frequency strong magnetic interference, free of misoperation, low in manufacturing cost, wide in application range and good in market popularization prospect.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.