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《Physical Experiment of College》 2012-04
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The Acquisition and Analysis about DTMF Based on the PC

XU Zheng-xing,TIAN Bing-tao,LIU Yao-chang,ZHANG Xiao-yu, WANG Ying,WU Bin,CHEN Dong-sheng(Shanghai Electric Power University,Shanghai 200090)  
Acquisting the sound of the DTMF means of the computer sound card and virtual instrument.It knows that the occurrence mechanism of the sound by analying the oscillogram and spectrogram.
【Fund】: 上海市大学生科研创新基金资助
【CateGory Index】: TP274.2;TN912.3
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