Abstract
The amplitude, AN1, and the latency, τN1, of the N1 component of round-window-recorded APs in the guinea pig are modified by simultaneous background noise and also for some time afterward by a preceding noise burst ('forward masking') White-noise masking acts differently below and above 60 dB with respect to its influence on AN1 and τN1.Forward masking is more effective if the delay time is short. On the basis of different slopes of the curves relating AN1 to noise intensity, the time during which forward masking has an effect can be subdivided into three periods. The period of shor delay is dominated by refractory mechanisms; during the period with long delays only adaptive mechanisms cause the masking; in the middle period both mechanisms are at work.Adaptation experiments performed in the presence of masking noise indicate a competitive action between masking and adaptation. At equal stimulus intensities there is a definite relation between S/N value and ISI value.The results of masking of the compound...
Published Version
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