| Relative contribution of off- and on-frequency spectral components of background noise to the masking of unprocessed and vocoded speech. | |
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MedLine Citation:
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PMID: 20968378 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The present study examined the relative influence of the off- and on-frequency spectral components of modulated and unmodulated maskers on consonant recognition. Stimuli were divided into 30 contiguous equivalent rectangular bandwidths. The temporal fine structure (TFS) in each "target" band was either left intact or replaced with tones using vocoder processing. Recognition scores for 10, 15 and 20 target bands randomly located in frequency were obtained in quiet and in the presence of all 30 masker bands, only the off-frequency masker bands, or only the on-frequency masker bands. The amount of masking produced by the on-frequency bands was generally comparable to that produced by the broadband masker. However, the difference between these two conditions was often significant, indicating an influence of the off-frequency masker bands, likely through modulation interference or spectral restoration. Although vocoder processing systematically lead to poorer consonant recognition scores, the deficit observed in noise could often be attributed to that observed in quiet. These data indicate that (i) speech recognition is affected by the off-frequency components of the background and (ii) the nature of the target TFS does not systematically affect speech recognition in noise, especially when energetic masking and/or the number of target bands is limited. |
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Authors:
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Frédéric Apoux; Eric W Healy |
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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: 128 ISSN: 1520-8524 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 2010 Oct |
Date Detail:
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Created Date: 2010-10-25 Completed Date: 2011-02-11 Revised Date: 2012-05-07 |
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: 2075-84 Citation Subset: IM |
Affiliation:
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Department of Speech and Hearing Science, The Ohio State University, Columbus, Ohio 43210, USA. fred.apoux@gmail.com |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acoustic Stimulation Adult Audiometry, Pure-Tone Auditory Pathways / physiology* Auditory Threshold Female Humans Male Noise / adverse effects* Perceptual Masking* Recognition (Psychology)* Signal Detection, Psychological* Speech Acoustics* Time Factors Young Adult |
| Grant Support | |
ID/Acronym/Agency:
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DC008594/DC/NIDCD NIH HHS; DC009892/DC/NIDCD NIH HHS; R03 DC009892-03/DC/NIDCD NIH HHS |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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