Document Detail

Auditory filter shapes and high-frequency hearing in adults who have impaired speech in noise performance despite clinically normal audiograms.
MedLine Citation:
PMID:  21361443     Owner:  NLM     Status:  MEDLINE    
Some individuals complain of hearing difficulties in the presence of background noise even in the absence of clinically significant hearing loss (obscure auditory dysfunction). Previous evidence suggests that these listeners have impaired frequency resolution, but there has been no thorough characterization of auditory filter shapes in this population. Here, the filter shapes of adults (n = 14) who self-reported speech recognition problems in noise and performed poorly on a sentence-in-noise perception test despite having clinically normal audiograms were compared to those of controls (n = 10). The filter shapes were evaluated using a 2-kHz probe with a fixed level of 30, 40, or 50 dB sound pressure level (SPL) and notched-noise simultaneous maskers that were varied in level to determine the masker level necessary to just mask the probe. The filters of the impaired group were significantly wider than those of controls at all probe levels owing to an unusual broadening of the upper slope of the filter. In addition, absolute thresholds were statistically indistinguishable between the groups at the standard audiometric frequencies, but were elevated in the impaired listeners at higher frequencies. These results strengthen the idea that this population has a variety of hearing deficits that go undetected by standard audiometry.
Rohima Badri; Jonathan H Siegel; Beverly A Wright
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of the Acoustical Society of America     Volume:  129     ISSN:  1520-8524     ISO Abbreviation:  J. Acoust. Soc. Am.     Publication Date:  2011 Feb 
Date Detail:
Created Date:  2011-03-02     Completed Date:  2011-06-20     Revised Date:  2013-06-30    
Medline Journal Info:
Nlm Unique ID:  7503051     Medline TA:  J Acoust Soc Am     Country:  United States    
Other Details:
Languages:  eng     Pagination:  852-63     Citation Subset:  IM    
Department of Communication Sciences and Disorders, Northwestern University, School of Communication, 2240 Campus Drive, Evanston, Illinois 60208, USA.
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MeSH Terms
Acoustic Stimulation
Audiometry, Pure-Tone
Audiometry, Speech
Auditory Threshold
Case-Control Studies
Hearing Disorders / classification,  psychology*
Middle Aged
Noise / adverse effects*
Pattern Recognition, Physiological
Perceptual Masking*
Signal Detection, Psychological
Speech Intelligibility*
Speech Perception*
Young Adult

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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