Forward masking suppresses sounds for 150-200 ms after masker offset even at high levels.

Evidence

The forward masking effect, in turn, has an effect over a much longer period of time, about 150–200 ms after the offset of the masker. Relatively high-level sounds are also masked, thus it is relevant in the context of this book. — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 1018

Categorization

• corroborated: 2 independent passages support this claim — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 1018