Precedence effect threshold curves hold stable across very different listening environments

Evidence

It is significant that all of the curves have the same basic shape from detection at the bottom, to the Haas-inspired equal-loudness curve at the top. The 174. agreement of the “equally loud” image curves, one determined by Hass on a hemi-anechoic rooftop in 1949 (Figure 6.2) is good. Further confirmation is in the precedence effect fusion interval for equal level direct and delayed sounds, shown here to be 40 ms, compared to 30 ms determined by Haas. Both observations add confirmation to the observation in Figure 6.7 that, at short delays, small room reverberation is not an important factor in these determinations. — Toole, Floyd E, Sound reproduction- the acoustics and…, 633

Categorization

• XREF: Connects to Haas precedence-effect literature and the room-acoustics vs anechoic debate central to psychoacoustic measurement methodology.