Acoustic receiving device

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 ...

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 distance between the target sound source and the sound pickup (sound transmission) device is long, the angle is not good, the background noise is large, or the feedback is strong, which may lead to the reduction of output gain, distortion or howling.

In particular, when the sound reinforcement equipment needs the support of many sound pickup (sound transmission) equipment, the complexity of its regulation and debugging can be imagined

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