作　　者： ; ;

机构地区： 清华大学医学院生物医学工程系

出　　处： 《实验技术与管理》 2013年第10期100-103,139,共5页

摘　　要： 为了研究不同声场条件下麦克风的特性,以满足生物医学工程声学实验教学的需求,研制了一套基于USB声卡的声学教学实验系统。该系统包含麦克风模块、硬件电路模块、USB声卡模块和终端计算机,以符合助听器和电子耳蜗等小型设备的前端信号采集的参数指标和尺寸要求。所搭建的系统为教学实验提供了一套声学测试平台,用于测试自由声场和放置头部模型等不同声场条件下的麦克风的特性,以及进一步通过麦克风阵列所进行的语音增强的系列研究。该开放式实验系统的搭建有利于培养学生对声学基本实验操作能力和对学生创新性思维的发掘。 In order to study the characteristics of microphone under different sound fields influence ,and to satisfy the requirements of experimental teaching of Biomedical Engineering , a USB sound-card based for teaching experiment system is developed . The proposed system includes microphone module , hardware circuits ,USB sound-card and a terminal PC ,which is conformed to the parameters and size constraints in the front-end signal acquisition of hearing aid and cochlear implant .The system provides a comprehensive platform to the teaching of the acoustics engineering .It supplies the function for signal acquisition and feature testing under different sound field conditions ,as well as the free sound field and the head influence conditions .Further open experiment ,such as microphone array based for speech enhancement ,can also be based on this platform . This teaching experiment system can help students strengthen their operating abilities and explore their innovative thinking .

关 键 词： 教学实验系统 麦克风 前端信号采集 声场

领　　域： [自动化与计算机技术] [自动化与计算机技术] [化学工程]