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

多功能信号波形生成与频谱分析仪，本人大学的毕业论文-Multi-function waveform signal generation and spectrum analyzer, My University thesis

基于labview的频谱分析仪，能分析几种几种信号，把采集过来的信号进行分析-Labview-based spectrum analyzer, to analyze a few of several signals, the analysis of the signal collected over

设计的虚拟频谱分析仪由周期性信号发生器、信号幅频/相频特性、频谱分析结果三个子模块组成。信号发生器子模块生成两路模拟输入信号，一路是可调频率、相位和振幅的正弦信号、方波、三角波、锯齿波、白噪声，另一路是指可调频率、相位和振幅的正弦波、方波、三角波、锯齿波、白噪声，最后利用信号合成器把两路信号混合起来作为生成的2路模拟信号(The designed virtual spectrum analyzer consists of three sub modules, which are periodic