Intensity-duration tradeoff in masking holds only for durations under 200 ms

Evidence

Simultaneous masking depends on duration of the test sound in such a way that the product of intensity and duration is constant for durations smaller than 200 ms. For larger durations, threshold is independent of duration. That effect can also be described as an intensity weighting by a time constant with a characteristic value of 200 ms. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 643

Categorization

• XREF: Connects to Bloch’s law / temporal integration in vision where similar intensity-duration reciprocity holds up to ~100 ms.