Document Detail

Static acoustic-immittance measurements.
MedLine Citation:
PMID:  513679     Owner:  NLM     Status:  MEDLINE    
The basic principles of deriving static acoustic-immittance measurements in human ears are presented. Problems caused by differences in instrumentation, computations, and measurement technique are discussed in terms of the utility and comparisons of static acoustic-immittance measurements. Data are provided regarding the short- and long-term variabilities inherent to static measurements. Although our subject pool was relatively small, certain patterns were apparent in the short- and long-term variability inherent to static acoustic-impedance measurements. The intra-event variability about the mean static acoustic impedance was small and varied inversely with probe-tone frequency. Standard deviations were less than 50 acoustic ohms for a 220-Hz probe tone and less than 25 acoustic ohms for a 660-Hz probe tone. Session-to-session variability in static measurements varied little within subjects but varied greatly across subjects. There was little correlation between the mean and standard deviation for within-subject measurements. Standard deviations across subjects approximate a relatively constant proportion (30-40%) of the mean static value. The need for large population studies of static acoustic-immittance measurements is noted.
T L Wiley; M G Block
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of speech and hearing research     Volume:  22     ISSN:  0022-4685     ISO Abbreviation:  J Speech Hear Res     Publication Date:  1979 Dec 
Date Detail:
Created Date:  1980-02-28     Completed Date:  1980-02-28     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0376336     Medline TA:  J Speech Hear Res     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  677-96     Citation Subset:  IM    
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MeSH Terms
Acoustic Impedance Tests* / instrumentation,  methods
Hearing Disorders / diagnosis
Reflex, Acoustic

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

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