Document Detail

Sound levels in a 2-cc cavity, a Zwislocki coupler, and occluded ear canals.
MedLine Citation:
PMID:  914674     Owner:  NLM     Status:  MEDLINE    
Probe-tube measurements of the differences in sound levels at three locations in ear canals were compared to the differences in levels measured at analogous positions in a Zwislocki coupler and a 2-cc cavity. The results support the recommendation of Sachs and Burkhard that probe tube measurements should not be made with the probe tube flush with the earmold tip and close to the sound inlet bore. In real ear canals the transfer functions to the eardrum presented by Bruel, Frederikson, and Rasmussen and by Studebaker agree well with each other but differ somewhat from the one used by Sachs and Burkhard. In agreement with Bruel et al., the data of this study reveal a plateau in the relationship between real ear and 2-cc cavity responses between about 1.6 and 4.0 kHz, the relative intensity level of which may depend upon residual ear canal volume.
V D Larson; G A Studebaker; R M Cox
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of the American Audiology Society     Volume:  3     ISSN:  0360-9294     ISO Abbreviation:  J Am Audiol Soc     Publication Date:    1977 Sep-Oct
Date Detail:
Created Date:  1977-12-29     Completed Date:  1977-12-29     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  7602679     Medline TA:  J Am Audiol Soc     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  63-70     Citation Subset:  IM    
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MeSH Terms
Acoustics / instrumentation
Ear Canal*
Hearing Aids / standards*
Models, Structural

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