Hearing forms loudness by integrating sound energy over about 100-200 ms

Evidence

The loudness percept requires some time to build up. The loudness level caused by a 2-kHz tone burst is shown in Figure 10.16. When the length of the burst decreases from 100 ms, the loudness decreases 10 phones each time the length is decreased to one tenth, indicating that the loudness percept is formed by integrating sound energy over time. This operation performed by our hearing is called temporal integration. For a sound burst lasting longer than 200 ms, loudness no longer increases (Fastl and Zwicker, 2007). — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 1171

Categorization

• DEFINE: Names and explains the temporal integration mechanism of loudness perception.
• corroborated: 3 independent passages support this claim — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 1171
• XREF: connects to: Loudness develops over time after a sound ends, so later noise can interrupt it; Loudness halves for every tenfold decrease in tone duration below 100 ms — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 3329; Hearing thresholds are defined for steady tones lasting over 100 ms (+6 more)