| Study of acoustic nonlinearity parameter B/A for seawater |
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| 作者姓名： | LU Zhiqu GONG Xiufen and WANG Yuqin |
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| 作者单位： | Institute of Acoustics. Nanjing University. Lab of Modern Acoustics，Nanjing University 210008 |
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| 摘 要： | I.Introductionlnthcearlyfifties,thercweremanyresearchworksonpropagatingmechanismofultrasonicwaveinseawater,itssoundve1ocity,absorptionandattenuation.Withthedevelop-mcntandapp1icationofhigh-powersoundsourcc,suchasSONARinnavy,thenonlinearacousticaleffectscausedbyfiniteamplitudeu1trasonicwavetravellingthroughseawaterbecomemoreevident.Thcrcfore,tostudythesenonlinearacousticaleffectsandtheirinfluenccsalsobecomcsmuchmoreimportant.Moreover,ithasbeenexpccted'foralongtimetogetalowfrequencyandhighlydi…
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Study of acoustic nonlinearity parameter B/A for seawater |
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| Authors: | LU Zhiqu GONG Xiufen and WANG Yuqin |
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| Abstract: | The B/ A values of NaCl solution and arhficial seawater (prepared by LymanFleming formula) with different salinities and temperatures are measured and compared with the calculated B / A values in literature. The results show that the B / A values of NaCl solution increase linearly with increasing temperature and slightly with increasing salinity; the B / Avalues of artificial seawater increase linearly as temperature increases; basically, thc values match those obtained in literature1]; NaCl solution can be used to simulate seawater approximately. |
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| Keywords: | Nonlinearity parameter Artificial seawater |
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