Forward masking follows masker termination and is also called post masking

Evidence

Because the test sound is presented after the termination of the masker, the effect is called post-stimulus masking, shorted to “post masking” (the expression “forward masking” is also used). — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 401

Categorization

• DEFINE: Clarifies the term ‘post masking’ (a.k.a. forward masking), which appears as a distinct phenomenon from simultaneous masking.