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Sound Diffusers Based on Number Theory with Random Variations of Surface Acoustic Impedance

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Schroeder diffusers are known as good, broadband sound scattering devices. Diffusers with variable acoustic impedances on surfaces are characterized by smaller sound scattering than Schroeder ones, however they have a plane shape. Combined Schroeder and variable acoustic impedance diffuser is a good solution. In the paper a computer simulation and some experimental results of sound scattering by these diffusers are presented.

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