Optimal absorber placement requires flat-Fourier-transform weighting

Evidence

There are also mathematically based procedures for the optimum placement of absorbing materials to encourage diffusion; for more details on this, see Angus (1995). What is required is an amplitude weighting, that is, a pattern of absorbers, which gives a flat Fourier transform. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2102

Categorization

• DEFINE: Explains the technical criterion for diffuser absorber layout: a flat Fourier transform of the amplitude weighting.
• XREF: Connects to signal-processing concepts of impulse response and Fourier analysis met earlier in the book. — connects to: The Fourier transform unwinds periodic signals into flat DC; m-sequences offer flat Fourier properties suited to diffusion design
• corroborated: 2 independent passages support this claim — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2102