Wind noise resistant microphone structure and microphone environment noise blocking method

Abstract

The invention relates to the technical field of electronic products, and discloses a wind-noise-resistant microphone structure which is arranged on an electronic device and comprises a sound receiving microphone, a noise reduction microphone, an air bag, an airflow fan and a sensing unit. The sound receiving microphone is arranged on one side of the electronic device and used for receiving user voice, the noise reduction microphone is arranged on the other side of the electronic device and used for receiving user voice and environment noise, the air bag is arranged close to the sound receiving microphone and can be inflated, and the air flow fan is used for inflating the air bag; the sensing unit can drive the airflow fan to operate; when the environmental noise is too loud, the sensing unit judges that the environmental noise is too loud and then drives the airflow fan to inflate the air bag, and the expanded air bag prevents noise waves of the environmental noise from being transmitted to the radio microphone; according to the invention, the influence of wind noise on radio quality can be effectively reduced, the noise reduction effect is achieved, and the call quality is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to a microphone structure, in particular to a wind noise resistant microphone structure and an environmental noise blocking method. BACKGROUND

[0002] Existing wireless communication devices often produce significant noise interference due to strong wind blowing, which seriously affects the call quality. For example, when using a microphone outdoors, the microphone's sound reception is affected by strong wind blowing, resulting in wind noise. Since wind noise is a low-frequency pressure wave, it can cause distortion in the microphone signal output, resulting in a decrease in call quality. Although some noise reduction methods such as active noise reduction earphones and capacitive microphone capacitive noise reduction have been applied, these solutions are usually expensive and have limited effectiveness. Therefore, there is an urgent need for a new wind noise resistant technology to improve the voice communication experience in harsh environments.

[0003] The background section is only used to help understand the content of the present application, so the content disclosed in the background section may include some prior art that is not known to those skilled in the art. The content disclosed in the background section does not represent the problems to be solved by the content or one or more embodiments of the present application, which have been known or recognized by those skilled in the art before the present application is filed. SUMMARY

[0004] The present application provides a wind noise resistant microphone device. The technical solution of the present application effectively reduces the wind noise interference caused by strong wind through special design and algorithm processing, thereby significantly improving the call quality of the user.

[0005] The present application further provides a microphone environmental noise blocking method, which can effectively reduce the influence of environmental noise on the sound reception of the microphone.

[0006] Other purposes and advantages of the present application can be further understood from the technical features disclosed in the present application.

[0007] To achieve one or some or all of the above purposes or other purposes, one embodiment of the present application provides an anti-wind noise microphone structure arranged on an electronic device, which comprises a sound receiving microphone, a noise reduction microphone, an air bag, an air flow fan and a sensing unit. The sound receiving microphone is arranged on one side of the electronic device to receive user voice. The noise reduction microphone is arranged on the other side of the electronic device to receive user voice and environmental noise. The air bag is arranged close to the sound receiving microphone and can be inflated. The air flow fan provides air for the air bag to inflate. The sensing unit is electrically connected to the sound receiving microphone, the noise reduction microphone and the air flow fan, and can drive the air flow fan to operate. When the environmental noise is too large, the sensing unit drives the air flow fan to inflate the air bag after judgment, and the inflated air bag blocks the noise wave of the environmental noise from reaching the sound receiving microphone.

[0008] In some embodiments, the sensing unit comprises a sound processor and a microprocessor. The sound processor processes audio data from the sound receiving microphone and the noise reduction microphone. The microprocessor controls the overall operation and algorithm operation of the overall device.

[0009] In some embodiments, the microprocessor calculates the difference between user voice and environmental noise to determine whether to drive the air flow fan to inflate the air bag.

[0010] In some embodiments, the audio data of the sound receiving microphone and the noise reduction microphone are transmitted to the sound processor for mixing and enhancement processing. The microprocessor analyzes and adjusts the phase difference between the two sets of signals according to a specific algorithm, thereby realizing the anti-phase sound wave adjustment technology.

[0011] In some embodiments, the sound receiving microphone is arranged close to the user's sound emitting end, and the noise reduction microphone is arranged close to the environmental sound receiving end.

[0012] In some embodiments, when the air flow fan is turned on to inflate the air bag, it is in anti-wind noise mode, and when the air flow fan is turned off, it is in general mode.

[0013] In some embodiments, when the environmental noise exceeds a set value, the sensing unit starts the anti-wind noise mode. When the sound captured by the sound receiving microphone contains wind noise interference, the background sound and target voice information can be separated through the data of the noise reduction microphone.

[0014] In some embodiments, the air flow fan is a piezoelectric ceramic air pump. The air is continuously discharged through high-frequency vibration, and the flow of the discharged air does not produce pulsation.

[0015] To achieve one or some or all of the above purposes or other purposes, an embodiment of the present application provides a microphone ambient noise blocking method, characterized by comprising the following steps: a sound collecting microphone and a noise reduction microphone are respectively arranged on different positions of an electronic device, and an inflatable air bag is arranged near the sound collecting microphone; a sensing unit is electrically connected to the sound collecting microphone, the noise reduction microphone and an air flow fan, and the sensing unit can drive the air flow fan; when the noise reduction microphone senses excessive ambient noise, the sensing unit judges and drives the air flow fan to inflate the air bag, and the inflated air bag blocks the noise waves of the ambient noise from reaching the sound collecting microphone.

[0016] Based on the above, an embodiment of the present application has at least one of the following advantages or effects. The wind noise resistant microphone device of the embodiment of the present application inflates the air bag by using the air flow fan, so as to change the entering direction of the ambient noise, the sound collecting microphone avoids directly receiving the ambient noise, and then the noise reduction microphone collects the wind noise, the sound collecting data of the two microphones are processed by the sound processor and the microcontroller through an algorithm, the phase inversion sound wave adjusts and reduces the influence of the wind noise on the sound collecting quality, and the noise reduction effect is improved to improve the call quality. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and serve to explain the principles of the application. In the drawings:

[0018] Figure 1 System architecture diagram of the wind noise resistant microphone device according to an embodiment of the present application;

[0019] Figure 2 Anti-wind noise mode off schematic diagram according to an embodiment of the present application;

[0020] Figure 3 Anti-wind noise mode on schematic diagram according to an embodiment of the present application;

[0021] Figure 4 Flowchart of the microphone ambient noise blocking method according to an embodiment of the present application.

[0022] Legend of reference signs:

[0023] 1: microphone structure

[0024] 10: sound collecting microphone

[0025] 12: noise reduction microphone

[0026] 14: air bag

[0027] 16: air flow fan

[0028] 18: sensing unit

[0029] 182: sound processor

[0030] 184: microprocessor

[0031] 2: output device DETAILED DESCRIPTION

[0032] The aforementioned and other features and advantages of the application will be more fully understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0033] Referring to Figure 1 , Figure 1 is a system block diagram of a wind noise resistant microphone device according to an embodiment of the present application. As shown in Figure 1 , a microphone structure 1 is disposed on an electronic device, which includes a sound receiving microphone 10, a noise reduction microphone 12, an air bag 14, an air flow fan 16, and a sensing unit 18. The sound receiving microphone 10 is disposed on one side of the electronic device to receive user voice, and the noise reduction microphone 12 is disposed on the other side of the electronic device to receive user voice and ambient noise. Generally, the sound receiving microphone 10 is disposed close to a user's voice emitting end, and the noise reduction microphone 12 is disposed close to an ambient sound receiving end. The microphone structure 1 of the present application can be disposed in or out of the housing of the electronic device, and is not limited in this regard. The air bag 14 is disposed close to the sound receiving microphone and can be inflated, and the air flow fan 16 provides air for inflating the air bag 14. The air flow fan 16 can be, for example, a small micro fan. The sensing unit 18 is electrically connected to the sound receiving microphone 10, the noise reduction microphone 12, and the air flow fan 16, and can drive the air flow fan 16 to operate. When the ambient noise is too large, the sensing unit 18 judges and drives the air flow fan 16 to inflate the air bag 14. The inflated air bag 14 blocks the noise waves of the ambient noise from reaching the sound receiving microphone 10. In addition, the sensing unit 18 can output sound through an output device 2, which can be, for example, a speaker.

[0034] Referring to Figure 1, the sensing unit 18 includes a sound processor 182 and a microprocessor 184, the sound processor 182 is mainly for processing audio data from the receiving microphone 10 and the noise reduction microphone 12, and the microprocessor 184 controls the overall operation and algorithm operation of the overall device. The microprocessor 184 and the sound processor 182 calculate the difference between the user's voice and the ambient noise to determine whether to drive the air flow fan 16 to inflate the air bag 14. The audio data of the receiving microphone 10 and the noise reduction microphone 12 are transmitted to the sound processor 182 for mixing and enhancement processing, and the microprocessor 184 analyzes and adjusts the phase difference between the two groups of signals according to a certain algorithm, thereby realizing the reverse wave adjustment technology.

[0035] That is, the sensing unit 18 can be pre-set with parameters related to audio data, and when the received ambient noise is greater than the preset parameter, the microprocessor 184 and the sound processor 182 will cooperate to determine whether to drive the air flow fan 16 to inflate the air bag 14.

[0036] Figure 2 For the anti-wind noise mode closing diagram according to an embodiment of the application, please also refer to Figure 1 When the air flow fan is closed as a general mode. In a general normal use state, the receiving microphone 10 is responsible for receiving the user's voice, and the noise reduction microphone 12 is used to receive the user's voice and the ambient noise, the air flow fan 16 is closed and the air bag 14 is in a reduced state, which does not affect the receiving of the receiving microphone 10 and the noise reduction microphone 12, and the microprocessor 184 and the sound processor 182 calculate the voice call signal.

[0037] Figure 3 For the anti-wind noise mode opening diagram according to an embodiment of the application, please also refer to Figure 1 When the air flow fan 16 is opened to inflate the air bag 14 as an anti-wind noise mode. The noise reduction microphone 12 receives the user's voice and the ambient noise, and the sensing unit 18 identifies that the ambient noise is greater than the user's voice, starts the anti-wind noise use state, that is, opens the anti-wind noise mode, and the air flow fan 16 inflates the air bag 14, so that the air bag 14 is in an inflated and enlarged state to affect the receiving of the receiving microphone 10, and the receiving microphone 10 receives the user's voice and isolates the wind noise. In detail, the microprocessor 184 and the sound processor 182 calculate the difference between the receiving microphone 10 and the noise reduction microphone 12 to determine whether the ambient noise exceeds the set value, and the sensing unit 18 starts the anti-wind noise mode. When the sound captured by the receiving microphone 10 contains wind interference, the background sound and target voice information can be separated from the data of the noise reduction microphone 12.

[0038] Specifically, the present application mainly has two working modes: general mode and wind noise resistance mode. In general, the normal use state, the sound receiving microphone 10 is responsible for receiving user voice, and the noise reduction microphone 12 is used to receive user voice and environmental noise for normal sound reception. When the sensing unit 18 judges that the environmental noise is greater than the preset parameter, the wind noise resistance mode will be started, and the sensing unit 18 will drive the air flow fan 16 to inflate the air bag 14. The working principle of the present application mainly uses the air flow fan 16 to inflate the air bag 14, and then blocks and changes the direction of the environmental noise entering. By adjusting the air flow path, the direction of the strong wind is avoided from the position of the sound receiving microphone 10. Generally, the sound receiving microphone 10 is placed in an area that avoids direct reception of strong wind, thereby reducing the noise interference it receives. The noise reduction microphone 12 is specially used to capture noise signals in the environment. When the noise exceeds the set value, the sensing unit 18 system starts the wind noise resistance mode. When the sound receiving microphone 10 captures the sound containing wind interference, the data of the noise reduction microphone 12 can more accurately separate the background sound and the target voice information, and the audio data collected from the two microphones will be transmitted to the sound processor 182 for mixing and enhancement processing; Then the microprocessor 184 analyzes and adjusts the phase difference between the two groups of signals according to the specific algorithm, so as to realize the anti-phase sound wave adjustment technology. By canceling the noise captured by the noise reduction microphone 12, the influence of the noise on the sound quality of the sound receiving microphone 10 is reduced.

[0039] It should be noted that the air flow fan 16 of the present application is a piezoelectric ceramic air pump. The air flow fan 16 is designed to use ceramic ultrasonic vibration as a driving source and use it as a fan. The air flow fan 16 has a suction side and an exhaust side with a suction nozzle or a nozzle (not shown), so it is easy to connect to a pipeline. Moreover, the air flow fan 16 may, for example, be a Murata type micro fan, but is not limited thereto. The air flow fan 16 of the present application can achieve one-way air flow without using a valve. Compared with ordinary motor type diaphragm pumps, the air flow fan continuously discharges air through high-frequency vibration, and the discharged air flow does not produce pulsation.

[0040] Figure 4For the flow chart of the microphone ambient noise blocking method according to an embodiment of the present application, an embodiment of the present application proposes a microphone ambient noise blocking method, characterized by comprising the following steps: a sound collecting microphone and a noise reduction microphone are respectively arranged on different positions of an electronic device, and an inflatable air bag is arranged near the sound collecting microphone; a sensing unit is electrically connected to the sound collecting microphone, the noise reduction microphone, and an air flow fan, and the sensing unit can drive the air flow fan; when the noise reduction microphone senses an excessive ambient noise, the sensing unit judges and drives the air flow fan to inflate the air bag, and the inflated air bag blocks the noise waves of the ambient noise from reaching the sound collecting microphone. The sensing unit receives user voice and ambient noise, judges whether the ambient noise is excessive, if yes, the sensing unit drives the air flow fan to inflate the air bag, and retains the voice to be uploaded to the sound collecting microphone; if not, the sensing unit maintains normal voice to be uploaded to the sound collecting microphone.

[0041] Please refer to Figure 1 , the sensing unit 18 judges whether to drive the air flow fan 16 to inflate the air bag 14 according to the difference between the user voice and the ambient noise calculated by the microprocessor 184 and the sound processor 182. The audio data of the sound collecting microphone 10 and the noise reduction microphone 12 are transmitted to the sound processor 182 for mixing and enhancement processing, and the microprocessor 184 analyzes and adjusts the phase difference between the two groups of signals according to a specific algorithm, thereby realizing the anti-phase sound wave adjustment technology. That is to say, the parameters of the audio data can be pre-set in the sensing unit 18, when the received ambient noise is greater than the pre-set parameters, the microprocessor 184 and the sound processor 182 will cooperate to judge whether to drive the air flow fan 16 to inflate the air bag 14. The air flow fan 16 is used to inflate the air bag 14 to block and change the direction of the ambient noise entering, and by adjusting the air flow path, the direction of the strong wind is avoided to be the position of the sound collecting microphone 10, thereby reducing the influence of the ambient noise on the sound collection.

[0042] Based on the above, an embodiment of the present application has at least one of the following advantages or effects. The windproof noise microphone device of the embodiment of the present application inflates the air bag by using the micro fan, changes the direction of the ambient noise entering, avoids the sound collecting microphone to directly receive the ambient noise, and then collects the wind noise by the noise reduction microphone. The sound collecting data of the two microphones is processed by the sound processor and the microcontroller according to the algorithm, the anti-phase sound wave adjustment reduces the influence of the wind noise on the sound collecting quality, and the noise reduction effect is improved to improve the call quality.

[0043] The above descriptions are only the preferred embodiments of the present application, and cannot limit the scope of the present application. Any simple equivalent changes and modifications made according to the scope and content of the present application are still within the scope of the present application. In addition, any embodiment or scope of the present application does not need to achieve all the purposes, advantages or features disclosed in the present application. Furthermore, the abstract and title are only used to assist the search of the patent document, and are not used to limit the scope of the present application. In addition, the terms "first", "second", etc. mentioned in the specification or scope of the present application are only used to name the elements or distinguish different embodiments or scopes, and are not used to limit the upper or lower limit of the number of elements.

Claims

1. A wind-noise-resistant microphone structure, mounted on an electronic device, characterized in that, include: A microphone is mounted on one side of the electronic device to receive user voice. A noise-canceling microphone, located on the other side of the electronic device, is used to receive user voice and ambient noise; An airbag is positioned near the microphone and is inflatable. An airflow fan inflates the airbag. The sensing unit is electrically connected to the microphone, the noise-canceling microphone, and the airflow fan, and can drive the airflow fan to operate; When the ambient noise is too loud, the sensing unit determines that the airflow fan is driven to inflate the airbag. The inflated airbag blocks the noise waves from the ambient noise from being transmitted to the microphone.

2. The wind noise-resistant microphone structure as described in claim 1, characterized in that, The sensing unit includes a sound processor and a microprocessor. The sound processor processes audio data from the microphone and the noise-canceling microphone, and the microprocessor controls the overall operation and algorithm calculation of the device.

3. The wind noise-resistant microphone structure as described in claim 2, characterized in that, The microprocessor and the sound processor calculate the difference between the user's voice and the ambient noise to determine whether to drive the airflow fan to inflate the airbag.

4. The wind noise-resistant microphone structure as described in claim 2, characterized in that, The audio data from the microphone and the noise-canceling microphone are transmitted to the sound processor for mixing and enhancement. The microprocessor analyzes and adjusts the phase difference between the two sets of signals according to a specific algorithm, thereby realizing the anti-phase sound wave modulation technology.

5. The wind noise-resistant microphone structure as described in claim 1, characterized in that, The microphone is positioned close to the user's voice output end, and the noise-canceling microphone is positioned close to the ambient sound receiving end.

6. The wind noise-resistant microphone structure as described in claim 1, characterized in that, When the airflow fan is turned on to inflate the airbag, it is in anti-wind noise mode; when the airflow fan is turned off, it is in normal mode.

7. The wind noise-resistant microphone structure as described in claim 6, characterized in that, When the ambient noise exceeds the set value, the sensing unit activates the anti-wind noise mode. When the sound captured by the microphone contains wind noise interference, the background noise and target voice information can be separated through the data from the anti-wind noise microphone.

8. The wind noise-resistant microphone structure as described in claim 1, characterized in that, The airflow fan is a piezoelectric ceramic air pump.

9. The wind noise-resistant microphone structure as described in claim 1, characterized in that, The airflow fan continuously discharges air through high-frequency vibration, and the discharged airflow does not produce pulsation.

10. A method for blocking ambient noise with a microphone, characterized in that, Includes the following steps: A microphone for recording audio and a noise-canceling microphone are respectively installed at different locations on the electronic device, and an inflatable airbag is installed near the microphone for recording audio. The sensing unit is electrically connected to the microphone, the noise-canceling microphone, and the airflow fan, and the sensing unit can also drive the airflow fan; When the noise-canceling microphone senses excessive ambient noise, the sensing unit determines this and then drives an airflow fan to inflate the airbag. The inflated airbag blocks the noise waves from the ambient noise from reaching the microphone.

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