Wideband Power Reflectance and Power Transmittance as Tools for Assessing Middle-Ear Function

Jeng, Patricia S.; Allen, Jont B.; Miller, Judi A. Lapsley; Levitt, Harry

doi:10.1044/hhdc18.2.44

Cited by 2 publications

(2 citation statements)

References 9 publications

(18 reference statements)

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“…Energy reflectance is just the complement to the absorbance. Both are convenient measures, taking values between zero and one, and can be easily measured over a wide frequency range by supplying wideband stimuli (clicks or chirps) as test signals [ 12 , 13 ]. Compared with traditional tympanometry, measures based on absorbance or reflectance provide much more information about middle ear conditions and allow better evaluation of middle ear disorders [ 10 , 14 , 15 , 16 , 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Measurement of Wideband Absorbance as a Test for Otosclerosis

Śliwa

Kochanek

Jędrzejczak

et al. 2020

JCM

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The purpose of this study was to investigate the effectiveness of wideband energy absorbance in diagnosing otosclerosis by comparing the differences in acoustic absorbance between otosclerotic and normal ears. Exactly 90 surgically confirmed otosclerotic ears were included in the test group. The control group consisted of 126 matched normal-hearing subjects. The Titan hearing test platform (Interacoustics) was used for absorbance and acoustic immittance tests. Energy absorbance, measured at tympanometric peak pressure, was analyzed in the range 226–8000 Hz. Differences between normal and otosclerotic ears were analyzed in quarter-octave bands. Wideband absorbance, i.e., absorbance averaged over the 226–2000 Hz band, and resonance frequency were calculated and compared between normal and otosclerotic ears. Significant differences between the absorbance of normal and otosclerotic ears were found, especially at low and middle frequencies. No significant effect of ear side or gender was observed. For average wideband absorbance and resonance frequency, less pronounced (although significant) differences were found between normal and otosclerotic ears. Measurement of peak-pressure energy absorbance, averaged over a frequency band around 650 Hz, provides a valid criterion in testing for otosclerosis. The test is highly effective, with a sensitivity and specificity of over 85% and area under receiver operating characteristic curve above 0.9. Average wideband absorbance can also be used, but its effectiveness is lower. Other immittance-related measures are considerably less effective.

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Section: Introductionmentioning

confidence: 99%

Measurement of Wideband Absorbance as a Test for Otosclerosis

Śliwa

Kochanek

Jędrzejczak

et al. 2020

JCM

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“…To be clear, expressing these data as either a power reflectance or absorbance metric is a preference and not a requirement; it will not fundamentally change the result. It has been suggested that, by converting absorbance to transmittance, this metric would be less variable and may be more amenable to comparisons with hearing loss, because hearing loss is also expressed on a logarithmic (dB) scale (e.g., Allen et al, 2005;Jeng et al, 2008;Keefe & Simmons, 2003). Shahanaz, Bork, et al, 2009;Vander Werff, Prieve, & Georgantas, 2007), or the shape of the entire frequency reflectance profile (the present study).…”

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confidence: 79%