CHARACTERISATION OF PROPAGATION PARAMETERS FOR HIGH FREQUENCY SONAR IN TURBID COASTAL WATERS

摘要

Experimental measurements of sound attenuation by suspensions of solid particles have been carried out and the results have been compared with theoretical predictions based on a wave equation formulation for sound propagation in an equivalent homogeneous fluid. Measured values for the viscous absorption of both spherical and non-spherical particles show good agreement with theory as do measurements of the settling rate for glass spheres. The effect of the particles on the sound speed is shown to be negligible.