Objective: Distortion product otoacoustic emission (DPOAE) levels plotted as a function of stimulus frequency ratio demonstrate a bandpass shape. This bandpass shape is narrower at higher frequencies compared to lower frequencies and thus has been thought to be related to cochlear mechanical tuning.Design: However, the frequency- and level-dependence of these functions above 8 kHz is largely unknown. Furthermore, how tuning estimates from these functions are related to behavioural tuning is not fully understood.Study Sample: From experiment 1, we report DPOAE level ratio functions (LRF) from seven normal-hearing, young-adults for f(2) = 0.75-16 kHz and two stimulus levels of 62/52 and 52/37 dB FPL. We found that LRFs became narrower as a function of increasing frequency and decreasing level.Results: Tuning estimates from these functions increased as expected from 1-8 kHz. In experiment 2, we compared tuning estimates from DPOAE LRF to behavioural tuning in 24 normal-hearing, young adults for 1 and 4 kHz and found that behavioural tuning generally predicted DPOAE LRF estimated tuning.Conclusions: Our findings suggest that DPOAE LRFs generally reflect the tuning profile consistent with basilar membrane, neural, and behavioural tuning. However, further investigations are warranted to fully determine the use of DPOAE LRF as a clinical measure of cochlear tuning.

Wilson, U.s., Browning-Kamins, J., Durante, A.s., Boothalingam, S., Moleti, A., Sisto, R., et al. (2021). Cochlear tuning estimates from level ratio functions of distortion product otoacoustic emissions. INTERNATIONAL JOURNAL OF AUDIOLOGY, 60(11), 890-899 [10.1080/14992027.2021.1886352].

Cochlear tuning estimates from level ratio functions of distortion product otoacoustic emissions

Moleti A.;
2021-01-01

Abstract

Objective: Distortion product otoacoustic emission (DPOAE) levels plotted as a function of stimulus frequency ratio demonstrate a bandpass shape. This bandpass shape is narrower at higher frequencies compared to lower frequencies and thus has been thought to be related to cochlear mechanical tuning.Design: However, the frequency- and level-dependence of these functions above 8 kHz is largely unknown. Furthermore, how tuning estimates from these functions are related to behavioural tuning is not fully understood.Study Sample: From experiment 1, we report DPOAE level ratio functions (LRF) from seven normal-hearing, young-adults for f(2) = 0.75-16 kHz and two stimulus levels of 62/52 and 52/37 dB FPL. We found that LRFs became narrower as a function of increasing frequency and decreasing level.Results: Tuning estimates from these functions increased as expected from 1-8 kHz. In experiment 2, we compared tuning estimates from DPOAE LRF to behavioural tuning in 24 normal-hearing, young adults for 1 and 4 kHz and found that behavioural tuning generally predicted DPOAE LRF estimated tuning.Conclusions: Our findings suggest that DPOAE LRFs generally reflect the tuning profile consistent with basilar membrane, neural, and behavioural tuning. However, further investigations are warranted to fully determine the use of DPOAE LRF as a clinical measure of cochlear tuning.
2021
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/07 - FISICA APPLICATA (A BENI CULTURALI, AMBIENTALI, BIOLOGIA E MEDICINA)
English
Con Impact Factor ISI
Cochlear tuning
behavioural tuning
distortion product otoacoustic emissions
level ratio function
Wilson, U.s., Browning-Kamins, J., Durante, A.s., Boothalingam, S., Moleti, A., Sisto, R., et al. (2021). Cochlear tuning estimates from level ratio functions of distortion product otoacoustic emissions. INTERNATIONAL JOURNAL OF AUDIOLOGY, 60(11), 890-899 [10.1080/14992027.2021.1886352].
Wilson, Us; Browning-Kamins, J; Durante, As; Boothalingam, S; Moleti, A; Sisto, R; Dhar, S
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/271704
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