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- 저자 : Nikita Pinto (검색결과 1 건)
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Mohan Kumar Kalaiah,Alina Lasrado,Nikita Pinto,Usha Shastri 대한청각학회 2018 Journal of Audiology & Otology Vol.22 No.4
Background and Objectives: Strength of medial olivocochlear reflex can be measured reliably using contralateral inhibition of distortion product otoacoustic emissions (DPOAEs) when its fine structure is considered. However, measurement of fine structure of DPOAE is difficult with clinical equipment. Thus, this study investigated the clinically relevant test-retest reliability of contralateral inhibition of DPOAEs. Subjects and Methods: Twenty-six young adults withnormal hearing sensitivity participated. DPOAEs were recorded at 27 discrete f2 frequenciesbetween 800 Hz and 8,000 Hz at frequency resolution of 8 points per octave with and withoutcontralateral white noise presented at 50 dB SPL. To check for short term inter-sessionreliability, contralateral inhibition of DPOAEs were recorded in three sessions, two recordingsessions on first day separated by 30 minutes and third time after one week of the first session. Within each session, DPOAEs were recorded twice in single probe-fit condition to testfor intra-session reliability. Results: Cronbach’s alpha was calculated having poor reliability (α≤0.7) of contralateral inhibition of DPOAEs in both intra-session and inter-session conditionsfor most of the tested frequencies. 95% confidence intervals of contralateral inhibition magnitudealso showed large variability. Conclusions: The current results showed that thoughDPOAE amplitudes were highly reliable across sessions, amount of inhibition of DPOAEs wasnot reliable when DPOAEs were measured at discrete frequencies. These findings are concurrentwith the literature.
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