电子耳蜗双麦克风信号采集及不同参数波束形成特征研究  

Dual-microphone based signal acquisition and different parameters based beamforming features for cochlear implant

作　　者：陈又圣[1] 张春晓[1] 陈伟芳[1] 林崇博 CHEN Yousheng;ZHANG Chunxiao;CHEN Weifang;LIN Chongbo(School of Electronics and Communications,Shenzhen Institute of Information Technology,Shenzhen 518000,China)

机构地区：[1]深圳信息职业技术学院电子与通信学院,广东深圳518000

出　　处：《中国医学物理学杂志》2018年第7期811-815,共5页Chinese Journal of Medical Physics

基　　金：广东省自然科学基金(2016A030310073;2018A030313146);深圳市科技计划项目(JCYJ20160415114250896;GRCK2017042409552883);广东大学生科技创新培育专项资金(2018年攀登计划专项:pdjhb0859)

摘　　要：为了提高噪声环境下的电子耳蜗言语识别率,麦克风阵列语音增强的方法逐渐应用在电子耳蜗前端信号采集中。由于电子耳蜗尺寸的限制,双麦克风阵列信号采集是常见的模式,其形成的系统波束指向可用于特定方位的干扰信号的抑制。延迟、权重、频率和间距等参数影响着双麦克风系统的极性图。本文研究基于双麦克风模式的电子耳蜗信号采集和不同参数条件下的波束形成特点,为双麦克风模式的语音增强算法研究提供支持。To improve the speech recognition in noisy environment, the microphone array-based speech enhancement methods are applied in the front-end signal acquisition for cochlear implant. As size restriction in cochlear implant, dual-microphone signal acquisition is the most common mode, and the system beamforming can be used in ambient signal suppression. Parameters of delay, weight, frequency and distance can influence the beam patterns of dual-microphone system. Herein we research the dualmicrophone based signal acquisition in cochlear implant and the beamforming feature for different parameters, which provides supports for the research of speech enhancement based on dual-microphone mode.

关 键 词：电子耳蜗 双麦克风阵列 信号采集 波束形成 

分 类 号：R318[医药卫生—生物医学工程] TH776[医药卫生—基础医学]