ABSTRACT: Coherent and Incoherent Scattering by Oceanic Bubbles A substantial amount of
research on acoustic scattering by underwater bubbles is based on the theory of incoherent
scattering. More recent work, devoted to much denser bubble assemblies, has instead used
effective-media formulations that presuppose coherent effects. Here the mutual
relationship between the two approaches is elucidated. It is shown that, underlying the
incoherent results, is a WKB approximate solution of the effective equations. As an
application, the scattering by tenuous sub-surface bubble layers and acoustical bubble
counting techniques are examined. Significant differences with previous results are found.
J. Acoust. Soc. Am. 96, 332-341, 1994
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