ASW depends most on mid-frequency reflections within the first 80 ms

Evidence

The amount of sound energy available for contribution to the reverberant field is also a function of the absorption, because if there is a large amount of absorption, there will be less direct sound reflected off a surface to contribute to the reverberant field-remember that before the first reflection, the sound is direct sound. The amount of sound energy available to contribute to the reverberant field is therefore proportional to the residual energy left after the first reflection, Reverberant level is that which allows input to equal output FIGURE 6. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1763 (#complicates, via linked claim)

Categorization

• XREF: connects to: Reflections increase sensitivity to low and mid-Q resonances in reproduced sound; Higher absorption reduces the first-reflection energy that feeds the reverberant field — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1763; Early reflections must be suppressed about 15 dB to stay inaudible

Broader Connections

• Reflections increase sensitivity to low and mid-Q resonances in reproduced sound #complicates (0.75)
• Higher absorption reduces the first-reflection energy that feeds the reverberant field #complicates (0.72) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1763