Journal Article10.3109/00016487509121325
Normal Critical Bands In The Cat
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TL;DR: The measured critical bandwidth was greater than previously published values of the effective bandwidths of single fibres of the auditory nerve and does not fit in with the commonly accepted theory that the critical band represents the resolution of the cochlea.
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Abstract: Critical bands in the cat were measured by a behavioural psychophysical method. Pure tones were masked by noise of variable bandwidth but constant total power, geometrically centred on the test tone; the point at which the masked threshold began to fall as the masker bandwidth was increased estimated the critical bandwidth. At 2 kHz the critical bandwidth was also measured from the wideband masked thresholds of both tones and noise of variable bandwidth: this produced the same result as the first method. The measured critical bandwidth was greater than previously published values of the effective bandwidths of single fibres of the auditory nerve. The results do not fit in with the commonly accepted theory that the critical band represents the resolution of the cochlea.
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Citations
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References
Auditory Activity in Uncrossed Centrifugal Gochlear Fibres in Cat A Study of a Feedback System, II
TL;DR: The findings suggest that the uncrossed cochlear efferents and ipsilateral auditory afferents together form an auditory, closed feedback loop, which is directly influenced by the contralateral ear and support the hypothesis that the uncrossed and the crossed olivo-cochlear bundles together form a complex, auditory feedback mechanism.
Two-tone inhibition in auditory-nerve fibers.
TL;DR: It is found that the presence of a second tone diminishes the responses to the first tone if appropriate stimulus parameters are chosen and all fibers tested showed this two‐tone inhibition.