Comments on ’’Sound propagation through an East Australian current eddy’’ [J. Acoust. Soc. Am. 63, 1381–1388 (1978)

Abstract

The normal-mode theoretical spectra of acoustic intensity, applicable to the experiment reported in the subject paper, are presented for horizontal ranges of around 14 km. The sound-speed profile contained both a surface duct and a submerged duct. For the cases of sound sources in both the surface duct and the submerged duct (and a receiver in the submerged duct), the experimental results are in fair agreement with the theory. Surface scattering and volume scattering cannot account for the differences that did occur, since estimates of the scattered intensities are no higher than the normal-mode prediction.