基于LabVIEW的声音数据采集分析系统

The sound data acquisition and analysis system based on LabVIEW

设计了一种基于LabVIEW多线程技术和PC声卡地声音数据采集分析系统,该系统可以实时地对声音信号进行采集、分析和比对,并能及时得出检测结果,而且采集的声音数据和检测结果都会被保存下来,以备后期的调用,同时还可以与预先设置的标准声音进行对比识别。经过对吉他多音色的实际测试,显示在标准信号3%误差范围内,本系统的总体检测准确度平均达到了91%,具有较高的准确度和稳定性,并且通过多次实验发现误差阈值在3%~5%之间时,测试的准确度是最高的。适合应用于语音识别、环境噪声监测和产品检测等多种领域。

Based on LabVIEW multithreading and sound cards in a PC,this paper brings forward a data acquisition and analysis system,which can accomplish acquisition,analysis and comparison of sound signal in real time,and the detection results are obtained timely.Besides,both the sound data acquired and the detection results can be saved to prepare for the post call.It also can use to compare and recognize with the pre-set standard sound.After the actual test on guitar tone,the results show that in 3% error range of the standard signal,the overall detection accuracy in average reached 91%,with higher accuracy and stability.Many experiments show that when error threshold is between 3%and5%,the test accuracy is the highest.This solution can be extended to the field of speech recognition,ambient noise monitoring and laboratory measurement et al.