| Isoresponse versus isoinput estimates of cochlear filter tuning. | |
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MedLine Citation:
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PMID: 21104288 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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The tuning of a linear filter may be inferred from the filter's isoresponse (e.g., tuning curves) or isoinput (e.g., isolevel curves) characteristics. This paper provides a theoretical demonstration that for nonlinear filters with compressive response characteristics like those of the basilar membrane, isoresponse measures can suggest strikingly sharper tuning than isoinput measures. The practical significance of this phenomenon is demonstrated by inferring the 3-dB-down bandwidths (BW(3dB)) of human auditory filters at 500 and 4,000 Hz from behavioral isoresponse and isoinput measures obtained with sinusoidal and notched noise forward maskers. Inferred cochlear responses were compressive for the two types of maskers. Consistent with expectations, low-level BW(3dB) estimates obtained from isoresponse conditions were considerably narrower than those obtained from isolevel conditions: 69 vs. 174 Hz, respectively, at 500 Hz, and 280 vs. 464 Hz, respectively, at 4,000 Hz. Furthermore, isoresponse BW(3dB) decreased with increasing level while corresponding isolevel estimates remained approximately constant at 500 Hz or increased slightly at 4 kHz. It is suggested that comparisons between isoresponse supra-threshold human tuning and threshold animal neural tuning should be made with caution. |
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Authors:
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Almudena Eustaquio-Martín; Enrique A Lopez-Poveda |
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Publication Detail:
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Type: Journal Article Date: 2010-11-23 |
Journal Detail:
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Title: Journal of the Association for Research in Otolaryngology : JARO Volume: 12 ISSN: 1438-7573 ISO Abbreviation: J. Assoc. Res. Otolaryngol. Publication Date: 2011 Jun |
Date Detail:
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Created Date: 2011-05-03 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100892857 Medline TA: J Assoc Res Otolaryngol Country: United States |
Other Details:
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Languages: eng Pagination: 281-99 Citation Subset: IM |
Affiliation:
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Unidad de Audición Computacional y Psicoacústica, Instituto de Neurociencias de Castilla y León, Universidad de Salamanca, Calle Pintor Fernando Gallego 1, 37007, Salamanca, Spain. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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