Abstract
The parameters of acoustic media appropriate for the appearance of the effect of negative refraction of sound waves, caused by multiple resonant scattering by spherical inclusions, were analyzed. The frequency ranges of transparency windows were calculated, in which effective compressibilities and densities take negative values and the relative level of radiative losses is small. To optimize the parameters, relations were derived for estimating the width of frequency windows corresponding to negative refraction and the value of nonviscous attenuation of the acoustic wave.
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