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.
All Science Journal Classification (ASJC) codes
- Arts and Humanities (miscellaneous)
- Acoustics and Ultrasonics