PMID: 3760330Sep 1, 1986Paper

Auditory filter shapes in the chinchilla

The Journal of the Acoustical Society of America
D L Halpern, P Dallos

Abstract

Auditory filter shapes were determined for the chinchilla using the notched-noise technique [R. D. Patterson, J. Acoust. Soc. Am. 59, 640-654 (1976)]. Here, the derivative of the curve relating threshold to masker gap width outlines the shape of the auditory filter. Three chinchillas were trained, using positive reinforcement techniques, to provide forward masked thresholds at 1.0 and 10.0 kHz, at three masker spectrum levels. Unexpectedly, the threshold curves contained inflection points and regions of constant or nonmonotonic changes in threshold, so that the derived filters contained dips in their central passbands. Nonmonotonic variations in threshold may be discerned in human threshold versus notch width functions of previously published studies, suggesting that the two types of data are qualitatively similar. The filters computed from the chinchilla data widened with increasing masker level and were more broadly tuned than those obtained in humans. The physiological response to each frequency component of any stimulus is likely a combination of excitation and suppression. Hence, one cannot predict masked threshold from the acoustic spectra of the maskers used here since they differ from their internal representations. Thu...Continue Reading

Citations

Apr 7, 2010·Journal of the Association for Research in Otolaryngology : JARO·Ana Alves-PintoChristian J Sumner
Aug 1, 1988·Hearing Research·R R Fay
Nov 4, 2005·The Journal of the Acoustical Society of America·Ifat Yasin, Christopher J Plack
Mar 6, 2016·Brain Research·Neil J InghamIan M Winter
Sep 30, 2003·The Journal of the Acoustical Society of America·Brandon L SouthallDavid Kastak

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