Design and implementation of array microphone for in-helmet voice communication system
Jia Ruixi
Zhou Geqiang
Tian Changsheng
Liu Hongjing
Shao Liang
Pan Cunxin
Abstract：To address communication interference in complex noise environments inside and outside helmets,this study aims to improve the acoustic communication quality of in-helmet systems.A four-element microphone array communication hardware system was designed and implemented for use within the confined space of a helmet.Based on simulations of the internal acoustic field,the system incorporates a set of signal processing techniques,including array beamforming,echo cancellation,stationary noise speech enhancement,non-stationary noise suppression,and automatic gain control,forming a complete voice signal processing framework.Experimental results show that the proposed in-helmet microphone array noise reduction system achieves favorable downlink voice clarity under a total noise level of 85 dB(A),preliminarily validating the effectiveness and applicability of the implemented algorithms.This research provides essential technical and theoretical support for the future design and development of open-form in-helmet communication systems.
Keywords：helmet systemcomplex noise fieldvoice communication systemmicrophone arraydownlink voicenoise reduction algorithm
Publication Date：2025-04-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 129-136 )