Document Detail

The perceptual tone-noise ratio of iterated rippled noise in listeners with hearing loss.
MedLine Citation:
PMID:  19355139     Owner:  NLM     Status:  In-Data-Review    
Previous work has demonstrated that iterated rippled noise (IRN) produces a weaker pitch in hearing-impaired (HI) listeners than in normal-hearing (NH) subjects (e.g., Leek and Summers, 2001). In this study, the hypothesis was tested that the weaker pitch is a result of an increased perceptual noisiness of IRN for HI subjects. The tone-noise ratio (TN) was developed by Patterson et al. (1996) to describe the relationship between the strength of the tone component and the strength of the noise component for a given IRN. The TN was measured using an adaptive procedure to find the tone-plus-noise level that matched each IRN stimulus. Four NH and 4 HI subjects took part in the study. The stimuli were IRNs with delays ranging from 4 to 16 ms and with one to eight iterations. There was a significant effect of delay and of iteration number, with longer delays and more iterations producing greater TN. There were no significant differences between subject groups. These findings suggest that the weaker complex pitch observed in listeners with hearing loss is not due to an abnormally noisy IRN percept but must be attributed to other impaired processing mechanisms. [Work supported by NIH.].
Marjorie R Leek; Sarah Melamed; Michelle R Molis; Frederick J Gallun
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of the Acoustical Society of America     Volume:  125     ISSN:  1520-8524     ISO Abbreviation:  J. Acoust. Soc. Am.     Publication Date:  2009 Apr 
Date Detail:
Created Date:  2009-04-09     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7503051     Medline TA:  J Acoust Soc Am     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2634     Citation Subset:  IM    
Natl. Ctr. for Rehab. Aud. Res., Portland VA Medical Ctr., 3710 SW US Veterans Hospital Rd., Portland, OR 97239.
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