Loudness processing acts as a temporal low-pass filter with about 45 ms integration time

Evidence

In terms of models, this means that the total loudness, the sum of all the specific loudnesses over the critical-band rate, is transferred through a special low-pass system, the impulse response of which corresponds to the temporal response of the loudness-processing neural system. … The approximation of the temporal effects in the model represents a kind of incomplete temporal integration. … Corresponding to the cut-off frequency of the special low-pass system, the integration time lasts roughly about 45 ms. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1295

Categorization

• DEFINE: Names the model mechanism: total loudness as a sum over critical-band rate passed through a low-pass system whose impulse response is the temporal loudness response.
• XREF: connects to: Loudness models need 100-200 ms time constants to capture temporal integration and post-masking. — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 1627