基于双TP型麦克风的电子耳蜗前端指向性语音增强系统的研制  

Study on dual TP microphone-based directional speech enhancement system for cochlear implant

作　　者：陈又圣[1] 宫琴[1] 

机构地区：[1]清华大学生物医学工程系,北京100084

出　　处：《仪器仪表学报》2010年第9期1952-1958,共7页Chinese Journal of Scientific Instrument

基　　金：国家"十一五"科技支撑计划(No.2008BAI50B08);北京市自然科学基金(No.3082012)资助

摘　　要：目前应用于临床的电子耳蜗在安静环境下的言语识别率较高,而在噪声环境下的言语识别率却大大降低。为了提高电子耳蜗在信噪比低的使用环境下的言语识别率,本文设计了用于研究电子耳蜗前端的麦克风阵列语音增强算法的硬件系统,并采用了两个同时具有全向性输出和方向性输出的TP微型麦克风模块以适应电子耳蜗严格的体积限制。实验结果显示:所设计的小间距的基于双TP型微型麦克风的电子耳蜗前端指向性语音增强系统的采集效果达到了设计的指标。该系统具有麦克风数量少,多通道采集的优点,为研究适合于复杂噪声环境的具有多麦克风、多参数、小间距特征的麦克风阵列语音增强算法的提供了有效的硬件平台。Present Cochlear Implant（CI） in clinic has high speech recognition in quiet environment,whereas it has low speech recognition under noisy environment.In order to improve speech recognition performance for CI users,a microphone-array directional speech enhancement system for CI front-end as the algorithm research platform was proposed.In this system,two microphone modules with uni-directional and omni-directional outputs for each module are used to meet the strict size limitation of CI products.Debugging result shows that the data acquisition effect of this short-distance dual TP microphone-based directional speech enhancement system achieves the designed requirement.The system has the advantages of fewer microphones and multi-channel acquisition,which provides an effective hardware platform for the directional speech enhancement algorithm research of microphone arrays in complex noise environment.

关 键 词：语音增强 TP型麦克风 指向性 电子耳蜗 

分 类 号：TH776[机械工程—仪器科学与技术] R318[机械工程—精密仪器及机械]