Abstract
A self‐consistent multiple scattering approach using the T‐matrix method with suitable pair‐correlation function has been employed to study the frequency‐dependent properties of rubber materials containing a random distribution of voids. Numerical results indicate that for a certain range of concentration of voids, the resonance of the voids controls the frequency‐dependent effective properties such that the imaginary part of the effective wavenumber becomes greater than the real part. The so‐called “superviscous” propagation in which the propagating wave may be damped out over a distance smaller than a wavelength, seems to occur over a bandwidth controlled by the concentration of voids (c). The bandwidth increasing with concentrations in the range 0 0.10, this kind of behavior does not exist for the material system considered.
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