Diffusion reduces early reflection level without absorbing sound energy.
Evidence
A novel approach to controlling early reflections is not to try to suppress or redirect them but instead diffuse them. This results in a reduced reflection level but does not absorb them. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2315
Categorization
- DEFINE: Distinguishes diffusion from absorption as distinct strategies for controlling early reflections.
Related
- Reflected sound intensity is reduced in proportion to the absorption coefficient (similarity 0.85)
- Diffuse wall reflections are temporally spread and lower in level than specular ones (similarity 0.84)
- Any change in surface reflectivity, not just bumps, causes sound diffusion (similarity 0.83)
- Diffuse surfaces prevent sound focusing away from the optimum listening position (similarity 0.83)
- Redirecting reflections creates uneven hot areas, so absorption is often chosen. (similarity 0.83)
- Absorbing first reflections cascades to attenuate the whole reflected sound field (similarity 0.83)
- ASW depends most on mid-frequency reflections within the first 80 ms (similarity 0.83)
- Absorption coefficients reduce reflected intensity by their proportion (similarity 0.82)
- Surface absorption weakens early reflections below inverse-square-law predictions (similarity 0.82)
- Higher absorption reduces the first-reflection energy that feeds the reverberant field (similarity 0.82)
- Distributing absorption in small random amounts around a room improves sound diffusion (similarity 0.81)
- Absorption at each reflection governs how fast reverberation decays (similarity 0.81)
- Redirecting reflections creates uneven hot spots while absorption shortens reverberation (similarity 0.80)
- Random-incidence absorption coefficients fail to predict actual reflected spectra (similarity 0.80)
- Early reflections must stay below roughly 15 dB to avoid blurring a stereo image (similarity 0.80)