Sound Speed and Attenuation in Multiphase Media
BOSTON UNIV MA DEPT OF AEROSPACE AND MECHANICAL ENGINEERING
Pagination or Media Count:
One research goal developed from conducted shallow water SW acoustic transmission experiments in sandy-silty areas 1 revealed a nonlinear power law frequency-dependent attenuation at lower frequencies less than or equal to 1 kHz consistent with results reviewed in 2-5 and the observations by the ONR-HEP program. The Biot Theory 6 predicts that the sandy- sediment frequency-dependent attenuation should be quadratic, alpha f alpha fo f fo exp n with n 2 however the observed dependence was n 1.8 plusminus 0.2 . Thus the long-range goal was to develop a simplified theory of sediment attenuation 7 verified by measurements that could explain this dependence and be applied to ocean sediments.
- Physical and Dynamic Oceanography
- Acoustic Detection and Detectors