Development Of Sound Intensity Measurement System And Its Application In Distinguishing Noise Source Of Automobile

In this dissertation, the available sound intensity instruments are dissected, the development tendency of the sound intensity measurement and analysis (SIMAS) is predicted and a SIMAS using cross-spectral method based on a microcomputer, DASP software and the Microsoft Windows platform is developed.To measure, calculate, display, print sound intensity sound pressure, sound power, three dimensional sound intensity spectrum, equal intensity contour are all deeply studied. A set of software using Multiple Document Interface(MDI) running under Microsoft Windows platform is developed. The performances and the functions of the system are all at the top level domestically and it can be used in real engineering. It has characteristics of simple structure and low-cost.