Above the transition frequency room-curve wiggles are interference, not resonances
Evidence
If the anechoic loudspeaker data do not reveal evidence of resonances, fluctuations in steady-state room curves are almost certainly attributable to acoustical interference. It is highly improbable that the propagation path from the loudspeaker to the microphone/listener contains a potent acoustical resonance mechanism above the transition frequency. — , Toole, Floyd E - Sound reproduction-…, 412
Categorization
- DEFINE: Cleanly distinguishes acoustical interference (location-dependent, non-minimum-phase, un-equalizable) from resonances (wide-radiating, minimum-phase, equalizable) as the two causes of room-curve fluctuation.
- XREF: connects to: Room resonances shift from isolated to overlapping at the Schroeder frequency; At high frequencies rooms act as irregular interference fields rather than standing-wave patterns; Room size does not alter steady-state curves above 400 Hz — Toole, Floyd E, Sound reproduction- the acoustics and…, 1338 (+4 more)
Broader Connections
- A transition frequency separates modal from ray acoustical behavior in rooms
#corroborates(0.95) — Toole, Floyd E, Sound reproduction- the acoustics and…, 475 - Room acoustics shift from standing waves to irregular interference as frequency rises
#corroborates(0.92) — , Toole, Floyd E - Sound reproduction-…, 626 - Room acoustical behavior changes across a broad transition region, not at one frequency
#qualifies(0.85) - Room effects minimally influence steady-state response above 1 kHz
#corroborates(0.80)