Abstract:Quadratic residue diffuser (QRD) is a device that distributes the acoustic energy of intense reflections by its
spatial and temporal dispersion. The quadratic residue diffuser consists of a series of wells of different depths and the same
width. Optimal diffusion is very important for perceiving musical sound and eliminating unwanted acoustic effects e.g.
echoes. For the purpose to determine the optimal diffusion, Schroeder used mathematical number sequences allowing to
diffuse the sound in a semicircular patt…
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