A simple expression for sound attenuation due to surface duct energy leakage in low-latitude oceans

Rui Duan; Kunde Yang; Yuanliang Ma; N Ross Chapman

doi:10.1121/1.4947012

A simple expression for sound attenuation due to surface duct energy leakage in low-latitude oceans

J Acoust Soc Am. 2016 May;139(5):EL118. doi: 10.1121/1.4947012.

Authors

Rui Duan¹, Kunde Yang¹, Yuanliang Ma¹, N Ross Chapman²

Affiliations

¹ School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an 710072, China duanrui.work@gmail.com, ykdzym@nwpu.edu.cn, ylma@nwpu.edu.cn.
² School of Earth and Ocean Sciences, University of Victoria, P.O. Box 3055, Victoria, British Columbia V8W 3P6, Canada chapman@uvic.ca.

PMID: 27250195
DOI: 10.1121/1.4947012

Abstract

This paper presents an expression for the attenuation of sound energy in an ocean surface duct due to energy leakage outside the duct. Dominant parameters determining the attenuation are the sound frequency and the surface duct thickness. The attenuation is found to be exponentially dependent on a scaled frequency that combines the two parameters. Data from experiments in low-latitude oceans with three different surface duct thicknesses are used to verify the exponential expression derived for the attenuation.

Publication types

Research Support, Non-U.S. Gov't