Across frequency processes involved in auditory detection of coloration

Publication: Research - peer-reviewConference abstract in proceedings – Annual report year: 2008

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When an early wall reflection is added to a direct sound, a spectral modulation is introduced to the signal's power spectrum. This spectral modulation typically produces an auditory sensation of coloration or pitch. Throughout this study, auditory spectral-integration effects involved in coloration detection are investigated. Coloration detection thresholds were therefore measured as a function of reflection delay and stimulus bandwidth. In order to investigate the involved auditory mechanisms, an auditory model was employed that was conceptually similar to the peripheral weighting model [Yost, JASA, 1982, 416-425]. When a “classical” gammatone filterbank was applied within this spectrum-based model, the model largely underestimated human performance at high signal frequencies. However, this limitation could be resolved by employing an auditory filterbank with narrower filters. This novel filterbank was designed to approximate auditory filter-shapes measured by Oxenham and Shera [JARO, 2003, 541-554], derived from forward masking data. The results of the present study demonstrate that a “purely” spectrum-based model approach can successfully describe auditory coloration detection even at high signal frequencies.
Original languageEnglish
TitleJournal of Acoustical Society of America
Number of pages3867
Volume123
PublisherAcoustical Society of America
Publication date2008
DOIs
StatePublished

Conference

ConferenceAcoustics'08
CountryFrance
CityParis
Period29/06/0804/07/08
Internet addresshttp://webistem.com/acoustics2008/acoustics2008/cd1/data/index.html

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Copyright (2008) Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America.

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