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

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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