Abstract：
OBJECTIVE:To investigate the effect of consecutive 1000-Hz tympanometry testing on admittance measures, and examine test-retest reliability. DESIGN:Repeated measures with eight trials of 1000-Hz Y(a) and B(a)/G(a) tympanometry, respectively, in two ears of each subject, followed by repeated 226-Hz tympanometry. STUDY SAMPLE:Twenty-seven normal-hearing young adults. RESULTS:For single-peak tympanograms, peak Y(tm) and G(tm) systematically increased across trials with a mean change of 8% and 15% at Trial 8, respectively, whereas B(tm) increased marginally. For notched tympanograms, peak Y(tm) and B(tm) decreased by 23% and 162% at Trial 8, and G(tm) in two cases also decreased (10% on average). Trial 2 and 3 contributed 50% to 70% of the total changes. Test-retest differences of subsequently acquired 1000- and 226-Hz tympanograms were smaller than previously reported. CONCLUSIONS:Consecutive testing significantly alters middle-ear admittance in 1000-Hz tympanometry. The outcome is contingent on tympanogram pattern and admittance component: Increase of peak Y(tm) and G(tm) in single-peak tympanograms and decrease of all measures in notched tympanograms. The present results complement previous studies on our understanding of the mechanism underlying this effect: a decrease of middle-ear stiffness. The effect of repetitive tympanometry should be accounted for in research involving sequential testing.
journal_name
Int J Audioljournal_title
International journal of audiologyauthors
Carazo CD,Sun XMdoi
10.3109/14992027.2014.955888subject
Has Abstractpub_date
2015-04-01 00:00:00pages
241-8issue
4eissn
1499-2027issn
1708-8186journal_volume
54pub_type
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journal_title：International journal of audiology
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