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Dependence of Sound Transmission Loss Characteristics of Elastic-viscoelastic Layered Damping Panel on Its Structural Parameters

Zheng Hui(Dept. of Mechanical & Electrical Engr., ShanghaiInstitute of Urban Construction Shanghai, 200092)Chen Duanshi; Luo Zhenhuang(National Key Lab. of Vibration, Shock & Noise,Shanghai Jiaotong University Shanghai, 200030)  
In this paper, the Transfer Matrix Method (TMM) has been developed for sound transmission loss(TL) calculation of elastic-viscoelastic layered damping panel (EVLDP) based on an analytical model ofwave-travelling in an infinite elastic and viscoedlastic extend. The sound TL calculation of EVLDP withdifferent configurations and varying parameters has been carried out using the TMM. According to the calculated results, the dependence of the acoustic coincidence frequencies and TL values in coincidence zoneon the geometric and physical parameter arrangement has been analysized, and some meaningful remarksachieved for the sound insulation design of EVLDP.
【CateGory Index】: O321
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