6.04  auditory after-effect; auditory negative afterimage. Phenomenon in which a familiar sound appears to take on a modulated quality after listening to rapid high-intensity pulses for about one minute.

Annotation         The after-effect, which varies with the sound pressure level and duration of the pulse train, usually lasts up to several seconds. Also, it can be an audible tone present upon cessation of a band-reject noise or band-reject pulse train, the tone having a pitch that usually corresponds to the midband frequency of the rejected band.

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