Diffuse reflections reduce comb-filtering that perturbs stereo imaging
Evidence
The effect of this is a large reduction of the comb filtering effects that highlevel early reflections cause. This is due to both the reduction in amplitude due to the diffusion and the smoothing of the comb filtering caused by the multiplicity of time delays present in the sound arriving from the diffuser. As these comb filtering effects are thought to be responsible for perturbations of the stereo image (Rodgers, 1981), one should expect improved performance even if the level of the early reflections is slightly higher than the ideal. — David Howard, Jamie Angus, coustics and Psychoacoustics, 2309
The effect of this is a large reduction of the comb-filtering effects that high-level early reflections cause. This is due to both the reduction in amplitude due to the diffusion and the smoothing of the comb filtering caused by the multiplicity of time delays present in the sound arriving from the diffuser. As these combfiltering effects are thought to be responsible for perturbations of the stereo image (Rodgers, 1981), one should expect improved performance even if the level of the early reflections is slightly higher than the ideal. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2323
Categorization
- XREF: Comb filtering parallels signal-processing interference patterns; connects to adjacent chapters on reflection and stereo perception. — connects to: Comb filtering is unavoidable and not inherently unpleasant; Real reflections are attenuated enough to tame comb filtering drastically; Console-mounted near-field monitors suffer comb filtering from coaxial reflections (+4 more)
- corroborated: 3 independent passages support this claim — David Howard, Jamie Angus, coustics and Psychoacoustics, 2309; David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2323
Broader Connections
- Room reverberation suppresses the comb-filter colouring of amplitude panning
#corroborates(0.85) — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 1890 - Removing conflicting reflections improves perception of low-level audio detail
#corroborates(0.78)