Behavioral suppression is measured as masker-threshold shift caused by the suppressor

Evidence

In experiment 2, the fixed-level signal was preceded by an off-frequency suppressor (1.2 or 2.4 kHz) presented simultaneously with the on-frequency masker. A suppressor level was chosen that did not produce any forward masking of the signal. Suppression was measured as the difference in on-frequency masker threshold with and without the suppressor present. — Dijk, Pim van, Physiology, Psychoacoustics and…, 919