Room reverberation suppresses the comb-filter colouring of amplitude panning
Evidence
In principle, amplitude panning methods create a comb-filter effect in the ear canal signal spectra, since the same sound arrives from both loudspeakers at each ear with a small time difference. This effect is clearly audible in an anechoic chamber, where it produces a notch in the spectrum between frequencies of 1 kHz and 2 kHz. Fortunately, this effect is not present when listening in a normal room, since the room reverberation mitigates the colouring effect largely (Pulkki, 2001a). — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 1890
Categorization
- XREF: Connects to my noise/silence reading: reverberation here functions as a protective mask, echoing how keynote ambient sound can wash out signal details. — connects to: Room reverberation can render phase-sensitive signals perceptually phase-insensitive — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 1281; Room reflections mitigate the phantom-center comb-filter dip near 2 kHz. — Toole, Floyd E, Sound reproduction- the acoustics and…, 445; Comb filtering is unavoidable and not inherently unpleasant (+6 more)
- corroborated: 2 independent passages support this claim — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 1890