The Realization Of Voice Analyzer Based On Virtual Instrument Technology

This article designed a kind of voice analyzer by using Labwindows/CVI based on the theoretical analysis of digital signal processing theories, virtual instrument technology and sound card application.This voice analyzer system includes two parts: hardware and software. Hardware consists of microphone, signal processing circuit and data collection circuit which is realized through sound card. Software uses modular programming and consists of virtual panel design and signal processing program which includes data collection module, reading data module, data processing module, data storing module and result showing module. The instrument realized all kind of signal analysis functions through software based on just simple hardware circuit. The software is very important to the whole system, and the more sophisticated the program is, the stronger the instrument is. All this embodies the idea that "software is instrument". This study has many strongpoints such as soft-upgrade, system self-adapting, windows visual showing, on-line debug optimization and so on. So this system is applicable to analyze and deal with signal in audio detecting system.