Reflection and Absorption of the Medium with Gradient Change of Impedance

Abstract:

The medium with gradient change of acoustic impedance is a new acoustic structure which developed from multiple layer structures. In this paper, the inclusion is introduced and a new set of equations is developed. It can obtain better acoustic properties based on the medium with gradient change of acoustic impedance. Theoretical formulation has been systematically addressed which demonstrates how the idea of utilizing this method. The sound reflection and absorption coefficients were obtained. At last, the validity and the correctness of this method are assessed by simulations. The results show that appropriate design of parameters of the medium can improve underwater acoustic properties.

• Periodical: Applied Mechanics and Materials (Volumes 536-537)
• Pages: 887-891
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.536-537.887
• Online since: April 2014
• Authors: Yu Sun, Bo Hu*
• Keywords: Acoustic Characteristic, Gradient, Multiple Layer, Transfer Matrix

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