Randomly spaced hemi-cylinder diffusers work far better than contiguously placed ones
Evidence
- Figure 12.24 shows the normalized diffusion coefficient for a single, and then for multiple hemi-cylinders with a 1 ft (0.3 m) diameter. The devices work well in isolation and when randomly spaced, showing Normalized Diffusion Coefficients between 0.7 and 1.0 above about 300 Hz, to a usefully low frequency. However, when placed contiguously, touching each other, the low-frequency diffusion is lost—the geometric regularity is also visible in the cyclical pattern in the curve. — Toole, Floyd E, Sound reproduction- the acoustics and…, 1387
Categorization
- XREF: The spatial-regularity-kills-performance pattern echoes diffusion panels in RF/EM wave engineering — regular spacing creates specular coherent behavior.