基于虚拟仪器技术的音频信号采集与处理

摘要

以LabVIEW为软件开发平台,使用计算机声卡作为硬件平台,设计开发了一种低成本高性能的音频信号采集分析系统.该系统具有对音频信号的采集、实时动态显示、分析处理、存储和播放等功能.实际应用表明,该系统不仅精度高、稳定、性能可靠、易操作,而且也能够实现声卡设计频率范围内的一般数据采集.基于声卡的,尤其是声卡与虚拟仪器相结合的信号采集技术在工程测试测量以及教学实践领域中具有广阔的应用前景.%An audio signal acquisition and analysis system with low-cost and high performance was developed, taking Lab-VIEW as the software development platform and the computer sound card as hardware platform. This system is capable of audio signal acquisition,real-time dynamic display,analysis processing,storage and display of audio signal. Practical application shows that this system has the advantages such as high-precision, stability, reliable performance and being easy-operated, and it can achieve common data-acquisition within the designed frequency range of the sound card. The signal acquisition technology based on the sound card, especially the technology combining with virtual instruments has broad prospects in the field of engineering test measurement and teaching practice.