本论文完成了对DSP芯片进行声音采集并利用USB进行传输的设计，实现了DSP系统的声音信号采集功能。
The essay finished the design of DSP for collection and USB for transmission, and uses the DSP system to obtain the collect function of sound signals.
同时对所采集的车辆声音信号应用模式识别中的主分量分析法实现了车辆的简单分类，为实现车型识别作了一些初步的探索。
At the same time, vehicle types are classified using PCA method of the pattern recognition based on vehicle noise, and some primarily study is done for vehicle recognition.
掌上相控阵可视听诊器，包括拾音器，用于采集声音信号并将声音信号转换成电信号；
The invention provides a handheld phased array visual stethoscope, which comprises a sound pick-up, a display, and a central processing unit.
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