Document Detail

Hearing aid measurements using the revised standard: reducing variability and determining test system accuracy.
MedLine Citation:
PMID:  7442193     Owner:  NLM     Status:  MEDLINE    
Unlike previous standards, the revised hearing aid standard, (ANSI S3.22-1976), specifies tolerance requirements for the electroacoustic characteristics of hearing aids. It is essential, therefore, that measurements of performance be made as accurately as possible. To assess the precision with which these measures can be made in a clinical environment, five hearing aids of the same model were each tested five times using Bruel and Kjaer instrumentation. When possible, data were recorded directly from the meter of the measuring amplifier as well as from the chart paper. The variability of the results was always less when data were obtained from the meter than from the chart. The ratio of the variability(meter:chart) differed depending on the test being made. The accuracy of the test system was derived (as required by the standard) both theoretically and empirically. When its estimated tolerances wee added to the tolerances permitted for the aids, all hearing aids were found to perform well within the limits of the standard except for one measurement on one aid.
T H Townsend
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of speech and hearing research     Volume:  23     ISSN:  0022-4685     ISO Abbreviation:  J Speech Hear Res     Publication Date:  1980 Jun 
Date Detail:
Created Date:  1981-02-26     Completed Date:  1981-02-26     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  0376336     Medline TA:  J Speech Hear Res     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  322-35     Citation Subset:  IM    
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MeSH Terms
Audiology / instrumentation
Evaluation Studies as Topic
Hearing Aids / instrumentation,  standards*

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

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