通过船舶噪声观测确定哈德逊河河口的声衰减

Determination of acoustic attenuation in the Hudson River Estuary by means of ship noise observations.

作者信息

Roh Heui-Seol, Sutin Alexander, Bunin Barry

机构信息

Davidson Laboratory, Stevens Institute of Technology, Hoboken, New Jersey 07030, USA.

出版信息

J Acoust Soc Am. 2008 Jun;123(6):EL139-43. doi: 10.1121/1.2908404.

DOI:10.1121/1.2908404

PMID:18537300

Abstract

Analysis of sound propagation in a complex urban estuary has application to underwater threat detection systems, underwater communication, and acoustic tomography. One of the most important acoustic parameters, sound attenuation, was analyzed in the Hudson River near Manhattan using measurements of acoustic noise generated by passing ships and recorded by a fixed hydrophone. Analysis of the ship noise level for varying distances allowed estimation of the sound attenuation in the frequency band of 10-80 kHz. The effective attenuation coefficient representing the attenuation loss above cylindrical spreading loss had only slight frequency dependence and can be estimated by the frequency independent value of 0.058 dBm.

摘要

对复杂城市河口的声音传播进行分析，在水下威胁探测系统、水下通信和声层析成像方面具有应用价值。最重要的声学参数之一——声音衰减，通过测量过往船只产生并由固定水听器记录的声学噪声，在曼哈顿附近的哈德逊河进行了分析。对不同距离处的船舶噪声水平进行分析，从而估算出10 - 80千赫兹频段内的声音衰减。表示高于柱面扩展损耗的衰减损失的有效衰减系数仅具有轻微的频率依赖性，并且可以通过0.058分贝每米的与频率无关的值来估算。