| Enhancing intelligibility of narrowband speech with out-of-band noise: evidence for lateral suppression at high-normal intensity. | |
| | |
MedLine Citation:
|
PMID: 15704428 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Previous studies have shown that the intelligibility of filtered speech can be enhanced by filling stopbands with noise. The present study found that this enhancement occurred only when speech intensity was sufficiently high to degrade performance. Intelligibility decreased by about 15% when narrowband speech was increased from 45 to 65 dBA (corresponding to broadband speech levels of about 60 and 80 dBA), and decreased by 20% at a level of 75 dBA. However, when flanking bands of low-pass and high-pass filtered white noise were added at spectrum levels of -40 to -20 dB relative to the speech, intelligibility of the 75-dBA speech band increased by about 13%. Additional findings confirm that this enhancement of intelligibility depends upon out-of-band stimulation, in agreement with theories proposing that lateral suppressive interactions extend the dynamic range of intensity coding by counteracting effects of auditory-nerve firing-rate saturation at high signal levels. |
| | |
Authors:
|
James A Bashford; Richard M Warren; Peter W Lenz |
Related Documents
:
|
11015328 - Exposure to behaviourally relevant odour reveals differential characteristics in rat ce... 20514998 - Spatial-frequency thresholds for configural and featural discriminations in upright and... 1737878 - The role of frequency selectivity in measures of auditory and vibrotactile temporal res... 17068598 - Optical performance of frequency-selective bolometers. 1252198 - Studies in infant behavioural audiometry. i. neonates. 12459578 - Cosmic rays, clouds, and climate. |
Publication Detail:
|
Type: Journal Article; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
|
Title: The Journal of the Acoustical Society of America Volume: 117 ISSN: 0001-4966 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 2005 Jan |
Date Detail:
|
Created Date: 2005-02-11 Completed Date: 2005-04-07 Revised Date: 2011-07-22 |
Medline Journal Info:
|
Nlm Unique ID: 7503051 Medline TA: J Acoust Soc Am Country: United States |
Other Details:
|
Languages: eng Pagination: 365-9 Citation Subset: IM |
Affiliation:
|
Department of Psychology, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53211, USA. bashford@uwm.edu |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Acoustics
/
instrumentation* Adolescent Adult Humans Noise* Speech Discrimination Tests Speech Perception* |
| Grant Support | |
ID/Acronym/Agency:
|
DC00208/DC/NIDCD NIH HHS; R01 DC000208-20A1/DC/NIDCD NIH HHS |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: The emergence of mature gestural patterns in the production of voiceless and voiced word-final stops...
Next Document: Stopped-pipe wind instruments: acoustics of the panpipes.