Acoustic receiving device

A sound receiving and microphone technology, applied in the field of sound processing, can solve problems such as poor angle, reduced output gain, complexity of regulation and debugging, etc., and achieve the effect of simple structure and improved output gain

Active Publication Date: 2013-03-27
GUANGZHOU RUIFENG AUDIO TECH
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AI Technical Summary

Problems solved by technology

[0002] In the application of sound reinforcement equipment, the main problem affecting the gain of sound reinforcement is that the direct sound received by the microphone and the signal of the sound wave fed back due to various reasons are of the same frequency and phase
In situations where the sound environment is relatively complex, it is often difficult to obtain a better sound pickup (sound transmission) effect
For example, the d

Method used

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Examples

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Example Embodiment

[0020] by figure 1 As shown, a sound receiving device includes a microphone array, a delay circuit, and a sound mixing output device. The microphone array includes a plurality of microphones, such as figure 1 As shown, the multiple microphones are M 1 , M 2 , M 3 ……M n , And the frequency response, sensitivity, and directivity characteristics of each microphone are basically the same;

[0021] The multiple microphones M 1 , M 2 , M 3 ……M n Arranged longitudinally in sequence along a straight line, the spacing distance between two adjacent microphones in the microphone array is both That is, the separation distance between two adjacent microphones in the microphone array is equal, and the separation distance is Where n is the total number of microphones in the microphone array, λ 0 Is the wavelength derived from the set center frequency, and λ 0 The calculation formula is as follows:

[0022] λ 0 = C 0 f 0

[0023] In the above formula, λ 0 Indicates wavelen...

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Abstract

The invention discloses an acoustic receiving device which comprises a microphone array, delay circuits and a mix output device. The sensor microphone comprises a plurality of microphones. The microphones are linearly, sequentially and longitudinally arrayed. Spacing distance of each two adjacent microphones in the microphone array is 1/n*Lambada<0>. An output end of each microphone in the microphone array is connected with one delay circuit. An output end of every delay circuit is connected with an input end of the mix output device. Delay time of the i-th delay circuit is the sum of the delay time of the last delay circuit and (n-i) times of a unit time. The acoustic receiving device can increase excited output gain of positive acoustic wave and greatly suppress output gain of non-positive acoustic wave in a certain range of frequency bandwidth. In addition, the acoustic receiving device can acquire approximate directional characteristics in the range of central frequency and adjacent frequencies. The acoustic receiving device is widely applicable to the field of pick-up (sound bearing).

Description

technical field [0001] The invention relates to sound processing technology, in particular to a sound receiving device comprising a longitudinal linear array composed of a plurality of microphones. Background technique [0002] In the application of sound reinforcement equipment, the main problem affecting the gain of sound reinforcement is that the direct sound received by the microphone and the signal of the sound wave fed back due to various reasons are of the same frequency and phase. Therefore, it is easy to make the sound reinforcement system produce positive feedback and cause howling. [0003] The feedback sound wave and the sound wave that the microphone should accept are generally not in the same direction. The most common solution is to enhance the directional characteristics of the microphone and reduce the influence of the feedback sound wave. [0004] The existing cardioid and supercardioid directional microphones are generally the most sensitive to the sound ...

Claims

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Application Information

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IPC IPC(8): H04R19/01
CPCH04R1/406H04R3/005H04R2201/403
Inventor 胡秉奇王以真
Owner GUANGZHOU RUIFENG AUDIO TECH
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