用微机实现的声强测量分析系统

Sound intensity measurement and analysis system with a PC

本文讨论了在IBM—PC上实现的声强测量分析系统。该系统除了能实现一般专用声强测量仪的功能以外,可绘制三维声强图(3D—sound intensity plots)和等声强线图(iso—intensity contour plots),并可按国际标准ISO/DIS9614.DOC对测定的声功率进行不确定度的评定,提出修正测量方案,使测定的声功率达到要求的精度。最后本文给出了应用本系统测量电机声功率的例子。

This paper discusses a sound intensity measurement system implemented on the IBM-PC. This system offer the functions of 3d-sound intensity plots and iso-intensity contour plots, as well as the general specifications of sound intensity measurement system. It also offer the evaluation of the uncer tainty of the measured sound power, propose an improved testing procedure in order meet the needs of testing accuracy. An example of sound intensity measurement for electric motor is presented.