Design And Implementation Of Micro Speech Noise Reduction System Based On Dual Microphone Array

In real life,with the rapid development of IC technology and signal processing technology,all kinds of portable electronic equipment becomes smaller and smaller,and the application of speech acquisition and processing in electronic equipment is more and more widely,which demand for better speech acquisition quality,higher volume,and lower power consumption.With the further development of speech signal processing technology,multi-microphone array becomes more popular.However,due to the problem of volume and power consumption,the quantity,topological structure and speech acquisition time of the microphone have been restricted.In the case of good noise reduction and speech enhancement,portable application of such system requires that both the number and size of microphones have to be small.Especially in some areas,people have higher requirements for the volume and performance of the voice acquisition device.This paper proposes a kind of micro noise reduction speech acquisition system which includes dual microphone array powered by lithium battery.The design and implementation of speech acquisition system with noise reduction based on dual microphone array are given,including detail design of hardware and software of the system.It is shown that the hardware acquisition circuit with two microphone array has low power consumption,small size and some other characteristics.The system adopts beamforming and computational acoustic scene analysis,which is capable to filter out multiple noise types.Finally,the hardware circuit of the proposed system was verified to be able to work properly.Moreover,the noise reduction effect of the system was tested in the practical office environment,which demonstrated the effective of the proposed system and provided further suggestions for improvement...