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Characterizing the Sound Insulation of a Specially Orthotropic Multi-Layered Medium

Published online by Cambridge University Press:  05 May 2011

H.-J. Lin ,
C.-N. Wang  and
Y.-M. Kuo
H.-J. Lin*
Affiliation:
Dept. of Electrical Engineering, National Panghu University, Penghu Hsien, Taiwan 88046, R.O.C.
C.-N. Wang*
Affiliation:
Dept. of Engineering Science and Ocean Engineering, National Taiwan University, Taipei, Taiwan 10617, R.O.C.
Y.-M. Kuo*
Affiliation:
Dept. of Engineering Science and Ocean Engineering, National Taiwan University, Taipei, Taiwan 10617, R.O.C.
*
*Professor
*Professor
**Ph.D. candidate
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Abstract

This work explores the sound transmission loss provided by the orthotropic multi-layers to elucidate the sound insulation of FRP (Fiber Reinforced Plastics). Mat is the major material considered in the numerical works. The transfer matrices of a single layer of the orthotropic laminate and the fluid are determined. Further, the boundary conditions on the various interface planes are arranged into matrix form. Combining the transfer matrixes and the boundary conditions and applying the transfer matrix method (TMM) yields the surface impedance and the sound transmission loss. The sound-propagation characteristics are studied. Additionally, the STC (Sound Transmission Class) of FRP and steel are compared and discussed.

Keywords

FRPCompositeAcousticTransfer MatrixTransmission Loss.
Type
Articles
Information
Journal of Mechanics , Volume 23 , Issue 1 , March 2007 , pp. 63 - 68
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2007

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