摘要
ＡｃｏｕｓｔｉｃａｌＭｏｄａｌＣａｌｃｕｌａｔｉｏｎｆｏｒＲｅｃｔａｎｇｕｌａｒＥｎｃｌｏｓｕｒｅａｎｄＩｔｓＥｘｐｅｒｉｍｅｎｔａｌＶｅｒｉｆｉｃａｔｉｏｎＷＡＮＧＦｅｎｇｌｉｎＰＥＮＧＣｈｕｎｙｉｅＳＯＮＧＺｈｉｑｉｎＬＩＨｕａｍｉｎ（王峰林）...
This paper presents the acoustic modal theory for a damped rectangular enclosure based on the acoustic wave equation, analyses the complex damping parameters and their experimental determination and the measuring system for the acoustic mode pattern in the enclosure designed by utilizing the adaptive filtering technique and high speed digital signal processor TMS320C25. Computer simulation and adaptive measuring test are carried out in an enclosure of 2.0×0 4×0 4m 3,and the acoustic modal distribution in the enclosure is found. Experimental results verify the analysis based upon the acoustic modal theory.
