Title :
A Simple and Accurate Formula for the Absorption of Sound in Seawater
Author :
Van Moll, Camiel A M ; Ainslie, Michael A. ; Van Vossen, Robbert
Author_Institution :
Underwater Technol. Dept., TNO Defence, Security & Safety, The Hague, Netherlands
Abstract :
In this communication, a new empirical formula for the absorption of sound in seawater is derived. The starting point of this investigation is the formula proposed by Ainslie and McColm for attenuation due to the boron and magnesium relaxations. Constants in the expression are treated as parameters to be determined. Since this is a nonlinear inverse problem, a global search is used to find the parameter setting that yields the best fit to in situ absorption measurements. The obtained formula is simpler than and at least as accurate as the widely used absorption formula of Franccedilois and Garrison (FG).
Keywords :
acoustic wave absorption; boron; magnesium; ocean chemistry; oceanographic techniques; pH; seawater; underwater sound; B; Francois-Garrison formula; Mg; boron; in situ absorption measurement; magnesium; pH; seawater; underwater sound absorption; Absorption in seawater; differential evolution; global search; ionic relaxation;
Journal_Title :
Oceanic Engineering, IEEE Journal of
DOI :
10.1109/JOE.2009.2027800
