声发射及其声卡检测方法的研究

Research on Acoustic Emission and Its sound Card Detection Method

声卡是多媒体技术中最基本的组成部分,是实现声波与数字信号相互转换的一种硬件,因而声卡的质量对接收信号以及信息的完整性和准确性有极大的影响。文章对于声卡的质量检测给予一种无损量化的评价和检测方法。这种方法同时也可以应用于其它具有声发射现象元件的量化检测。检测过程基于声发射器和示波器等硬件,利用MATLAB软件将不同波形进行对比,最终计算得出声卡的完好系数。

Sound card is the most basic part of multimedia technology,is a kind of hardware to realize the conversion of sound waves and digital signals,so the quality of sound card often has a great impact on the acceptance of signals and information integrity and accuracy.This paper gives a nondestructive quantitative evaluation and detection method for the quality detection of sound card,which can also be applied to the quantitative detection of other components with acoustic emission phenomenon.This method is based on the hardware such as acoustic transmitter and oscilloscope.the different waveforms are compared by MATLAB programming,and the sound card's intact coefficient is calculated.