Evaluation of Microphone Nonlinearities in Probes for Measurement of Otoacoustic Emissions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F25%3A00384811" target="_blank" >RIV/68407700:21230/25:00384811 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.61782/fa.2025.0366" target="_blank" >https://doi.org/10.61782/fa.2025.0366</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.61782/fa.2025.0366" target="_blank" >10.61782/fa.2025.0366</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Evaluation of Microphone Nonlinearities in Probes for Measurement of Otoacoustic Emissions

Popis výsledku v původním jazyce

Measurement of Distortion Product Otoacoustic Emissions (DPOAE) relies on evaluating the nonlinear response of the inner ear to two-tone excitation signals, specifically identifying the cubic intermodulation distortion products. However, the accuracy of these measurements can be adversely affected by nonlinear distortions within the electroacoustic measurement chain. This study examines the nonlinear behavior of microphones embedded in probes used for otoacoustic emission measurements. Nonlinearities were characterized using the source harmonic correction method reported in the literature, as there is no perfectly linear source of excitation signal. We focused on the quantification of second- and third-order harmonic distortion, which are key components of the nonlinear response of the microphone. The results are analyzed and compared to similar measurements performed on conventional and MEMS microphones, revealing specific characteristics of the probe microphone’s nonlinear response. Strategies for reducing nonlinear distortion in this context, as described in the literature, are also discussed. These findings contribute to the understanding of the limitations and potential improvements in the measurement accuracy of otoacoustic emissions by addressing microphone-induced nonlinearities.

Název v anglickém jazyce

Evaluation of Microphone Nonlinearities in Probes for Measurement of Otoacoustic Emissions

Popis výsledku anglicky

Measurement of Distortion Product Otoacoustic Emissions (DPOAE) relies on evaluating the nonlinear response of the inner ear to two-tone excitation signals, specifically identifying the cubic intermodulation distortion products. However, the accuracy of these measurements can be adversely affected by nonlinear distortions within the electroacoustic measurement chain. This study examines the nonlinear behavior of microphones embedded in probes used for otoacoustic emission measurements. Nonlinearities were characterized using the source harmonic correction method reported in the literature, as there is no perfectly linear source of excitation signal. We focused on the quantification of second- and third-order harmonic distortion, which are key components of the nonlinear response of the microphone. The results are analyzed and compared to similar measurements performed on conventional and MEMS microphones, revealing specific characteristics of the probe microphone’s nonlinear response. Strategies for reducing nonlinear distortion in this context, as described in the literature, are also discussed. These findings contribute to the understanding of the limitations and potential improvements in the measurement accuracy of otoacoustic emissions by addressing microphone-induced nonlinearities.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

<a href="/cs/project/GC23-07621J" target="_blank" >GC23-07621J: Otoakustické emise v normální kochlee a při přetlaku v endolymfatickém prostoru kochley: modelování a experimenty</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Forum Acusticum 2025

ISBN

978-84-87985-35-5

ISSN

3005-7124

e-ISSN

3005-7124

Počet stran výsledku

6

Strana od-do

—

Název nakladatele

European Acoustics Association

Místo vydání

Madrid

Místo konání akce

Malaga

Datum konání akce

23. 6. 2025

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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