Post masking with two maskers: Effects of bandwidth

Thresholds of test tone impulses masked by one masker M1 or two maskers M1 + M2 are determined in a post-masking (forward masking) stimulus paradigm. Test tones are centered at masker M1 and the bandwidth of M1 is varied. The magnitude of the threshold decrease AL caused by the addition of masker M2 depends on masker M1 as follows: Large AL for narrow-band noise and AM tone, medium AL for pure-and QFM-tone, almost no threshold decrease for broadband noise-masker M1.