Virtual Instrument Collection phonocardiogram source code, is based on the computer sound card, which determined the sound signal and spectrum analysis.

心音采集的虚拟仪器源代码，是基于计算机声卡的，里面有心音信号和频谱分析等。

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The only thing you need, is the software which can be found for free on the Internet, a good Internet connection, a microphone, speakers, and a sound card.

唯一你需要的是免费软件，可以发现在互联网上一个好的上网麦克风，喇叭、音效卡。

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Studies the techniques of signal generating and sampling based on the general sound card which solve the problem of generating the stimulant signal and sampling the experiment data.

研究了信号产生与采集技术，基于通用的声卡，解决了实验系统激励信号的产生和实验数据采集及处理的难题。

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