Document Detail

Comparison of acoustically coupled and mechanically coupled speech.
MedLine Citation:
PMID:  7316888     Owner:  NLM     Status:  MEDLINE    
Phonetically balanced work lists were mechanically coupled onto the ossicular chain of anesthetized guinea pigs by piezoelectric-type drivers and the resulting cochlear microphonic (CM) recorded on magnetic tape. Similar recordings of the CM resulting from free field tympanic membrane stimulation by hi-fi speakers were also obtained. The recordings were compared by conventional discrimination testing. In discrimination testing of all the raw recordings, listeners achieved essentially perfect scores. Addition of masking noise sufficient to reduce mean discrimination scores to 65-70% revealed no significant discrimination differences. When piezoelectrically initiated, CM-derived lists were compared with similar lists passed through hearing aids in an anechoic chamber, the preference of a panel of listeners for the quality of mechanically coupled speech was significantly higher. Mechanical-acoustical displacement equivalency at normal physiological levels and freedom from mechanical-electrical artifact were demonstrated by measurement of ossicular chain displacement by a fiber optic lever displacement transducer.
R O Cook; C W Hamm; W G Thomas; L H Royster
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Audiology : official organ of the International Society of Audiology     Volume:  20     ISSN:  0020-6091     ISO Abbreviation:  Audiology     Publication Date:  1981  
Date Detail:
Created Date:  1982-02-12     Completed Date:  1982-02-12     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  1273752     Medline TA:  Audiology     Country:  SWITZERLAND    
Other Details:
Languages:  eng     Pagination:  516-29     Citation Subset:  IM    
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MeSH Terms
Cochlear Microphonic Potentials
Guinea Pigs
Hearing Aids
Speech Discrimination Tests / methods*

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

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