The effect of temperature, pressure, and salinity on sound attenuation in turbid seawater
The effect of temperature, pressure, and salinity on sound attenuation in turbid seawater
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DOI：
10.1121/1.421088
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发表时间：
1998-12
影响因子：
2.4
通讯作者：
S. D. Richards
中科院分区：
文献类型：
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作者：
S. D. Richards
浅海水域的声衰减系数是设计人员和操作人员感兴趣的设备，如海军猎雷声纳、侧扫描测量声纳和声学多普勒电流分析器，通常使用的频率范围从几十千赫到几百千赫，可能高达1兆赫。在这些频率上，由于沿海浑浊水域特征的悬浮颗粒物引起的衰减对总衰减系数有重要贡献。本文采用合适的海水声速、密度和粘度随温度、盐度和压力的函数表达式，研究了温度、压力和盐度对含固体颗粒悬浮液海水总衰减系数的影响。结果表明，尽管在几百米深的水中，衰减随压力变化不大，但在100米深的水中，衰减随温度和盐度变化很大。
The acoustic attenuation coefficient in shallow coastal waters is of interest to designers and operators of devices such as naval mine-hunting sonars, sidescan surveying sonars, and acoustic Doppler current profilers, typically employing frequencies ranging from tens of kHz to several hundred kHz, possibly up to 1 MHz. At these frequencies attenuation due to suspended particulate matter which characterizes turbid coastal waters is an important contribution to the total attenuation coefficient. In this paper the effect of temperature, pressure, and salinity on the total attenuation coefficient for seawater containing a suspension of solid particles is investigated by employing suitable expressions for the sound speed, density, and viscosity of seawater as functions of temperature, salinity, and pressure. Results presented demonstrate that while there is little variation in the attenuation with pressure in up to a few hundred meters of water, there is significant variation with temperature and salinity over...