背衬对隔声去--静尔音隔音窗 小博士隔音膜.pdfVIP

2008 27 2 (Transducer and M icrosystem Technologies) 53 张阿漫, 姚熊亮, 钱德进, 庞福振 ( , 150001) : , , : , , , , , ; , , , ; , : ; ; ; : U661. : A : 1000- 9787( 2008) 02- 0053- 03 Effect of backing on sound absorption behavior of isolating-sound and decoup led tile ZHANG A-man, YAO X iong-liang, Q IAN De-jin, PANG Fu-zhen ( College of Sh ipbu ild ing Engineerin g, H arbin E ngin eer ing Un iversity, H arb in 150001, China Abstract: B ased on the transfer matrix m ethod, a different backing situation of underw ater isolating-sound and decoupled coverm odel is estab lished. The sound absorption perform ance of isolating-sound and decoupled tile is d iscussed under soft backing, rig id back ing, single-shell and doub le-shell backing. The resu lts show that the absorption coefficien t curve m arks m odulation behavior under doub le-shell backing, the w ater layer betw een the shells thickens and absorption peak value moves to low frequency. In addition, the num ber of peak increases and concentrates, the peak value also drops. The absorption coefficient is little influenced by the outer shell thickness. Under single-shell backing cond itions the more the thickness of the shell plate is, the less the first absorption peak value is, and the peak moves to low er frequency. When the plate thickness is up to a certain th ickness, the absorption coefficien t curve gradually approached that in rigid back ing. K ey word s: backing; transfer matrix; isolating-sound and decoup led tile; sound absorption behavior 0 , , , , :