On errors in estimating seabed scattering strength from long-range reverberation (L)

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Abstract

Shallow water acoustic reverberation is sometimes exploited to estimate properties of the seabed. In the process of estimating these properties, the scattering kernel (the dependence of the scattering on incident and scattered angle) is often assumed. That is, the scattering kernel is generally not known a priori. The errors associated with assuming an incorrect scattering kernel are explored and quantified for several types of scattering kernels. Choosing an incorrect scattering kernel can lead to significant errors in the frequency dependence of the estimated scattering strength. Finally, it is shown that the sonar equation approach for obtaining scattering strength from reverberation assumes that the scattering strength is independent of both incident and scattered angle. This assumption appears to be contrary to a large body of evidence that indicates the scattering strength decreases at low grazing angles.

Original languageEnglish (US)
Pages (from-to)2787-2790
Number of pages4
JournalJournal of the Acoustical Society of America
Volume118
Issue number5
DOIs
StatePublished - Nov 2005

All Science Journal Classification (ASJC) codes

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics

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