Microphone device and microphone setting method for eliminating near-field sound source interference
A microphone and sound source technology, applied in the direction of frequency/direction characteristic devices, etc., can solve the problems of poor interference elimination effect, achieve the effect of reducing sound feedback phenomenon, good anti-interference performance, and not easy to howling
Active Publication Date: 2017-02-22
SHENZHEN TAISHAN SPORTS TECH CO LTD
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Problems solved by technology
[0007] In view of the technical problem that the microphone device in the prior art has a poor effect of eliminating interference, the present invention provides a microphone device with a better effect of eliminating interference
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[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0031] In the microphone device of the present invention, two or more sound collectors with unidirectionality are used as the basis, and the spatial position relationship between the sound collectors is set so that different sound collectors can detect the sound collected by the sound source at the same position. The sound signal is full of differences, and the calculation is performed based on the differences to eliminate interference.
[0032] In order to fully understand the present invention, the function of the directional sound collector will be described below through the direction suppressi...
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The invention relates to a microphone device and a microphone setting method for eliminating the interference of a near-field sound source. The microphone device comprises a first microphone, a second microphone, a scaler and a subtracter, wherein the two microphones are unidirectional and an included angle greater than zero degree is formed between the directions of the two microphones; the scaler is connected with the first microphone, and used for scaling signals output by the first microphone according to preset multiplying power and then outputting the scaled signals; the subtracter is connected with the second microphone and the scaler, and used for subtracting signals output by the scaler from those output by the second microphone and then outputting a result. The microphone setting method for eliminating the interference of the near-field sound source comprises the following steps: setting the two microphones while keeping the included angle greater than zero degree between the directions of the two microphones, recording all sound sources, calculating the signals collected by the two microphones and then outputting a result. The microphone device provided by the invention and a microphone device set according the microphone setting method for eliminating the interference of the near-field sound source have better resistance to interference of near-field interference sound sources.
Description
technical field [0001] The invention relates to a sound collection device, in particular to a microphone device. [0002] In addition, the present invention also relates to a method for setting up a sound collection device, in particular to a method for setting up a microphone for eliminating interference from near-field sound sources. Background technique [0003] In a speech environment, the speech signal will inevitably be interfered by environmental noise. When the distance between the interference source and the microphone is relatively close, the receiving microphone will receive the composite signal of these sound sources, it is difficult to separate different sound sources, the interference source is difficult to remove, and it is difficult to obtain a clear and stable signal of the target sound source. [0004] In the application scenario, take a device with a microphone device as an example, such as a laptop, a smart TV, etc., the distance between the microphone d...
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IPC IPC(8): H04R1/20
Inventor 师丹玮刘刚
Owner SHENZHEN TAISHAN SPORTS TECH CO LTD