| Masked detection and discrimination of tone sequences under conditions of monaural and binaural masking release. | |
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MedLine Citation:
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PMID: 21428512 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Experiment 1 examined detection and discrimination of monaural four-tone sequences composed of 400-, 500-, and 625-Hz sinusoids. In the baseline conditions, the masker was monaural composed of 25-Hz-wide bands of random noise centered on 320, 400, 500, 625, and 781 Hz. In the binaural masking release conditions, the noise was presented diotically. In the monaural masking release conditions, the noise was presented to the same ear as the signal, but it was comodulated. Tones had half-amplitude durations of 30, 60, or 150 ms. There was no delay between successive tones, so the rate of frequency change depended on tone duration. Listeners discriminated between sequences composed of 500-400-625-500 Hz and 500-625-400-500 Hz. Discrimination results were poor for rapid sequences in both monaural and binaural masking release conditions relative to baseline conditions. Results from experiment 2 indicated that poor discrimination for rapid sequences could also occur in the baseline conditions, provided that the frequency separation among tonal components was small. Sluggish processing in the present paradigm was not restricted to conditions relying on binaural cues. It is argued that sluggishness may reflect a long temporal window in monaural and binaural masking release conditions or an interaction between poor cue quality and task difficulty. |
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Authors:
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Joseph W Hall; Emily Buss; John H Grose |
Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural |
Journal Detail:
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Title: The Journal of the Acoustical Society of America Volume: 129 ISSN: 1520-8524 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 2011 Mar |
Date Detail:
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Created Date: 2011-03-24 Completed Date: 2011-07-07 Revised Date: 2012-03-01 |
Medline Journal Info:
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Nlm Unique ID: 7503051 Medline TA: J Acoust Soc Am Country: United States |
Other Details:
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Languages: eng Pagination: 1482-9 Citation Subset: IM |
Copyright Information:
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© 2011 Acoustical Society of America |
Affiliation:
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Department of Otolaryngology/Head and Neck Surgery, University of North Carolina School of Medicine, 170 Manning Drive, Chapel Hill, North Carolina 27599-7070, USA. jwh@med.unc.edu |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Acoustic Stimulation Adult Analysis of Variance Audiometry, Pure-Tone Auditory Pathways / physiology* Auditory Threshold Cues* Humans Middle Aged Noise / adverse effects* Perceptual Masking* Pitch Discrimination* Psychoacoustics Signal Detection, Psychological* Time Factors Young Adult |
| Grant Support | |
ID/Acronym/Agency:
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R01 00397//PHS HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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