基于LabVIEW的多通道语音信号采集系统

基于麦克风阵列的时延估计声源定位方法是基于声音的相位信息的,所以保证声音的相位信息不失真,才能得到正确的声源定位结果。为了实时、准确、以较高的精度同步采集声源信号,进行后续声源定位研究。在此对LabVIEW驱动普通数据采集卡进行了研究,针对北京双诺公司生产的MP420数据采集卡,成功地实现了可供LabVIEW直接调用的动态库的编制与调用,并结合LY-901LS拾音器开发出了一套性价比较高的数据采集系统。实验表明,该系统操作简单,使用户更精确、方便地完成对语音数据的采集。

Developement of multi-channel voice signal acquisition system based on LabVIEW

Since the time delay estimation sound source localization method based on microphone array is relied on the phase information of the sound,the correct sound source localization result can be only obtained by ensuring the distortionless phase information of sound. In order to acquire real time,precise and higher accuracy synchronous sound signals,the research on sound source location was performed. Lab-view drived ordinary data acquisition card is studied deeply in this paper. A higher cost performance data acquisition system is developed successfully,which can achieve the direct writing and calling of Labview dynamic library. This system was designed by means of MP420 data acquisition card made in Beijing Shuangnuo Compony and LY-901LS pickup. Experiment results show that the system is easy to operate and enables users to complete the voice data acqui-sition more accurately and conveniently.