Document Detail

Long-term signal-to-noise ratio at the input and output of amplitude-compression systems.
MedLine Citation:
PMID:  19927686     Owner:  NLM     Status:  MEDLINE    
We present measurements showing that the long-term signal-to-noise ratio (SNR) at the output of an amplification system that includes amplitude compression may be higher or lower than the long-term SNR at the input, dependent on interactions among the actual long-term input SNR, the modulation characteristics of the signal and noise being mixed, and the amplitude compression characteristics of the system under test. The effects demonstrated with the measurements shown here have implications for choices of test methods when comparing alternative hearing aid systems. The results of speech-recognition tests intended to compare alternative systems may be misleading or misinterpreted if the above interactions are not considered.
Graham Naylor; René Burmand Johannesson
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Publication Detail:
Type:  In Vitro; Journal Article    
Journal Detail:
Title:  Journal of the American Academy of Audiology     Volume:  20     ISSN:  1050-0545     ISO Abbreviation:  J Am Acad Audiol     Publication Date:  2009 Mar 
Date Detail:
Created Date:  2009-11-20     Completed Date:  2009-12-15     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9114646     Medline TA:  J Am Acad Audiol     Country:  Canada    
Other Details:
Languages:  eng     Pagination:  161-71     Citation Subset:  IM    
Oticon Research Centre Eriksholm, Snekkersten, Denmark.
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MeSH Terms
Hearing Aids*
Speech Acoustics
Speech Perception

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

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