Document Detail

Attenuation provided by four different audiometric earphone systems.
MedLine Citation:
PMID:  2307308     Owner:  NLM     Status:  MEDLINE    
The attenuation provided by TDH earphones in MX-41/AR and P/N 51 cushions, Audiocup earphone enclosures and ER-3A insert earphones with ER3-14 foam earplugs was determined for 30 normally hearing subjects using a real-ear attenuation at threshold paradigm. The MX-41/AR and P/N 51 cushions provided about the same amount of attenuation which was less than the attenuation provided by the Audiocup enclosures. The ER-3A/ER3-14 provided the highest amount of attenuation. The MX-41/AR and ER-3A/ER3-14 attenuation values were in agreement with other studies using similar methodology. However, the attenuation provided by the Audiocup enclosures was considerably less, in the lower frequencies, than reported in two other studies. ANSI S3.1-1977 supra-aural earphone cushion attenuation values, which were determined using pure-tones presented in a free-field, should be replaced by earphone cushion attenuation values determined with 1/3 octave bands of noise presented in a diffuse sound field.
T Frank; D C Wright
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Ear and hearing     Volume:  11     ISSN:  0196-0202     ISO Abbreviation:  Ear Hear     Publication Date:  1990 Feb 
Date Detail:
Created Date:  1990-04-05     Completed Date:  1990-04-05     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  8005585     Medline TA:  Ear Hear     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  70-8     Citation Subset:  IM    
Department of Communication Disorders, Penn State University, University Park, Pennsylvania.
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MeSH Terms
Audiometry / instrumentation,  methods*
Ear Protective Devices*
Protective Devices*

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

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