Document Detail


Individual differences within and across feedback suppression hearing aids.
MedLine Citation:
PMID:  19358455     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: New and improved methods of feedback suppression are routinely introduced in hearing aids; however, comparisons of additional gain before feedback (AGBF) values across instruments are complicated by potential variability across subjects and measurement methods. PURPOSE: To examine the variability in AGBF values across individual listeners and an acoustic manikin. RESEARCH DESIGN: A descriptive study of the reliability and variability of the AGBF measured within six commercially available feedback suppression (FS) algorithms using probe microphone techniques. STUDY SAMPLE: Sixteen participants and an acoustic manikin. RESULTS: The range of AGBF across the six FS algorithms was 0 to 15 dB, consistent with other recent studies. However, measures made in the participants ears and on the acoustic manikin within the same instrument suggest that across instrument comparisons of AGBF measured using acoustic manikin techniques may be misleading, especially when differences between hearing aids are small (i.e., less than 6 dB). Individual subject results also revealed considerable variability within the same FS algorithms. The range of AGBF values was as small as 7 dB and as large as 16 dB depending on the specific FS algorithm, suggesting that some models are much more robust than others. CONCLUSIONS: These results suggest caution when selecting FS algorithms clinically since different models can demonstrate similar AGBF when averaging across ears, but result in quite different AGBF values in a single individual ear.
Authors:
Todd Ricketts; Earl Johnson; Jeremy Federman
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Publication Detail:
Type:  Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of the American Academy of Audiology     Volume:  19     ISSN:  1050-0545     ISO Abbreviation:  J Am Acad Audiol     Publication Date:    2008 Nov-Dec
Date Detail:
Created Date:  2009-04-10     Completed Date:  2009-05-01     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9114646     Medline TA:  J Am Acad Audiol     Country:  Canada    
Other Details:
Languages:  eng     Pagination:  748-57     Citation Subset:  IM    
Affiliation:
Department of Hearing and Speech Sciences, Vanderbilt Bill Wilkerson Center, Nashville, TN 37232-8242, USA. todd.a.ricketts@vanderbilt.edu
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MeSH Terms
Descriptor/Qualifier:
Acoustics / instrumentation*
Hearing Aids*
Hearing Loss / therapy
Humans
Individuality
Manikins
Noise / prevention & control*
Prosthesis Design
Prosthesis Fitting / methods
Reproducibility of Results

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


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