Document Detail


Just noticeable and objectionable group delays in digital hearing aids.
MedLine Citation:
PMID:  10858005     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Group delay in a digital signal processing (DSP) hearing aid may be perceived as an echo in the sound heard by a wearer listening to his or her own voice, due to a combination of unprocessed sound received at the ear through head and air pathways and delayed sound reaching the eardrum through the hearing aid. Depending on the amount, this delay may be audible or objectionable and can even result in auditory confusion. This study presents results from 18 subjects listening to their own voices through a DSP hearing aid with a variable group delay. The subjects varied the length of the delay and determined the amounts that were noticeable and objectionable as compared to the undelayed condition, while listening to their own amplified voices. Results indicated that a delay of 3 to 5 msec was noticeable to the listeners in 76 percent of the trials, and a delay of longer than 10 msec was objectionable 90 percent of the time.
Authors:
J Agnew; J M Thornton
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of the American Academy of Audiology     Volume:  11     ISSN:  1050-0545     ISO Abbreviation:  J Am Acad Audiol     Publication Date:  2000 Jun 
Date Detail:
Created Date:  2000-10-11     Completed Date:  2000-10-11     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  9114646     Medline TA:  J Am Acad Audiol     Country:  CANADA    
Other Details:
Languages:  eng     Pagination:  330-6     Citation Subset:  IM    
Affiliation:
Starkey Laboratories, Inc., Eden Prairie, Minnesota, USA.
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MeSH Terms
Descriptor/Qualifier:
Adult
Hearing Aids*
Humans
Male
Middle Aged
Speech Perception*
Time Factors

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


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