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Related Experiment Video

Updated: Feb 8, 2026

Performing Intracochlear Electrocochleography During Cochlear Implantation

Performing Intracochlear Electrocochleography During Cochlear Implantation

Published on: March 8, 2022

Cochlear Mechanisms and Otoacoustic Emission Test Performance.

Nikki A Go¹, Greta C Stamper², Tiffany A Johnson¹

¹Department of Hearing and Speech, University of Kansas Medical Center, Kansas City, Kansas.

Ear and Hearing

|June 29, 2018

Summary

Controlling cochlear-source mechanisms in otoacoustic emissions (OAEs) did not improve auditory status identification accuracy in a general population. Minor accuracy gains were observed in specific subgroups for mild hearing loss detection.

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Area of Science:

Audiology
Otoacoustic Emissions
Hearing Loss Diagnostics

Background:

Otoacoustic emissions (OAEs) are crucial for assessing auditory function.
Distinguishing between cochlear-source and reflection-source mechanisms in OAEs is key for accurate hearing status identification.
Previous methods often combine these sources, potentially affecting diagnostic precision.

Purpose of the Study:

To evaluate the impact of controlling cochlear-source contributions on the accuracy of identifying auditory status using OAEs.
To compare the diagnostic performance of distortion-product OAEs (DPOAEs) with controlled sources against standard DPOAEs.
To assess the utility of reflection-source OAEs (AM-SFOAEs) for hearing loss detection.

Main Methods:

Collected data from 212 subjects with normal hearing and mild to moderate hearing loss.
Utilized distortion-product OAEs (DPOAEs) and amplitude-modulated stimulus frequency OAEs (AM-SFOAEs).
Employed discrete cosine transform to isolate distortion-source contributions and analyzed area under the relative operating characteristic (AROC) curve for test accuracy.

Main Results:

Reducing reflection-source contribution in DPOAEs did not improve overall test accuracy.
Small accuracy increases (2%-5%) were noted in a subset of normal-hearing subjects with mild hearing loss at lower stimulus levels.
Reflection-source AM-SFOAEs did not show superior accuracy compared to DPOAE conditions.

Conclusions:

Restricting cochlear-source contributions via DPOAE fine-structure smoothing is unlikely to enhance diagnostic accuracy in the general population.
AM-SFOAEs are not expected to offer improved hearing status identification over DPOAEs.
Targeted improvements may exist for specific conditions, but broad application for enhanced OAE diagnostics is not supported by these findings.