Abstract: An acoustic energy transfer equation has been set to solve the multiple scattering problem in acoustic transfer in high concentration suspensions. The method used is easier to handle than the usual method. The equations can be interpreted in terms of the physical interactions and can be used for any value of the ratio of particle size to wavelength.
It has been found that when the multiple scattering is considered the scattering coefficient decreases by 5% in the case of ka = 3 and 14% in ka = 5 if scattering coefficient×path length < 0.256. As the path length increases, the scattering coefficient becomes even less.
In addition, the effect of particle size distribution on the scattering and the acoustic energy caused by the suspensions behind the acoustic receiver also has been discussed.