Diffusing early reflections lowers their level without absorbing the 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

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 Howard, Jamie Angus, coustics and Psychoacoustics, 2297

Categorization

• DEFINE: Clarifies diffusion as a third option distinct from absorption and redirection — useful conceptual triage for room acoustics.
• corroborated: 2 independent passages support this claim — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2315; David Howard, Jamie Angus, coustics and Psychoacoustics, 2297
• XREF: connects to: Diffusion reduces early reflection level without absorbing sound energy.; Absorbing reflections is easier to build but shortens reverberation time — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2291; Reflected sound intensity is reduced in proportion to the absorption coefficient — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1719 (+5 more)

Broader Connections

• Diffusion reduces early reflection level without absorbing sound energy. #corroborates (1.00)
• Diffusion replaces sparse loud early reflections with a dense set of quiet ones #expands (0.90) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2322
• Diffusing surfaces may not reduce perceived reflection loudness as expected #complicates (0.80) — Toole, Floyd E, Sound reproduction- the acoustics and…, 655
• Higher absorption reduces the first-reflection energy that feeds the reverberant field #contradicts (0.78) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1763
• Reflected sound intensity is reduced in proportion to the absorption coefficient #contradicts (0.75) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1719
• Absorbing first reflections cascades to attenuate the whole reflected sound field #contradicts (0.74)
• Redirecting reflections creates uneven hot spots while absorption shortens reverberation #qualifies (0.74)
• Absorbing reflections is easier to build but shortens reverberation time #qualifies (0.72) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2291