穿孔板声阻抗模型研究-南京大学学报（自然科学）.PDF

( ) 46 4 Vol. 46, No. 4 JOURNAL OF NANJING U NIVERSITY 2010 7 July 2010 ( NAT URA L SCIENCES) * ** 葛 俊 , 邱小军 ( , , , 2100 3) : . , . 3 : . ; , . . , . , , , , . , . , , , . , . , . , . 3 7 , , , . , . : , : O 42 A study on the acoustic impedance model of perforated panels Ge J un, Qi u X iaoJ un ( Key Laboratory of Modern Acoust ics and Institute of Acoustics, Nanjing University, Nanjing, 2100 3, China) Abstract: The perforated panels are w idely used in noise control and loudspeaker systems. Besides the inner acoustic impedance of each aperture, the int eractions among apertures have some effects on the acoust ic im pedance of the perforated panel. The previous studies on the acoustic im pedance of the perforated panel use the following three met hods: the simplified analyt ical methods, the experiment al methods and the numerical methods. The aforesaid analytical methods and experimental met hods are limited due to some special restrictions. Although the numerical met hods can predict the acoust ic impedance of the perforated panel accurately , it is not convenient in practical * : ( , : 200 - 12- 20 ** , Email: gejun@ nju. edu. cn 380 ( ) 46 situat ions. A simple analytical model is proposed t o simulate the acoustic impedance of the perforated panel. Considering each aperture in the per