Nonlinear Behavior of Condenser Microphones: Analytical Modeling and Experimental Validation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F25%3A00384805" target="_blank" >RIV/68407700:21230/25:00384805 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.61782/fa.2025.0624" target="_blank" >https://doi.org/10.61782/fa.2025.0624</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.61782/fa.2025.0624" target="_blank" >10.61782/fa.2025.0624</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Nonlinear Behavior of Condenser Microphones: Analytical Modeling and Experimental Validation

Popis výsledku v původním jazyce

This study investigates the nonlinear behavior of condenser microphones, with a focus on nonlinear capacitance as the primary source of nonlinearity. An experimental transducer was developed, consisting of a circular membrane and a fixed electrode with a central hole leading to a backing cavity. A linear analytical model for membrane displacement was derived using a multimodal approach, while a nonlinear model from the literature was used to relate the membrane displacement to the output voltage of the microphone. Experimental measurements of the nonlinear output of the transducer were conducted. A harmonic correction method from the literature was used to linearize the acoustic pressure incident on the transducer's membrane. These measurements were compared with theoretical predictions. The dependence of the first, second, and third harmonics of the output voltage on the input acoustic pressure level was analyzed. The results show good agreement between theoretical predictions and experimental data, particularly for the first and second harmonics, demonstrating the effectiveness of the proposed model in capturing the nonlinear characteristics of condenser microphones.

Název v anglickém jazyce

Nonlinear Behavior of Condenser Microphones: Analytical Modeling and Experimental Validation

Popis výsledku anglicky

This study investigates the nonlinear behavior of condenser microphones, with a focus on nonlinear capacitance as the primary source of nonlinearity. An experimental transducer was developed, consisting of a circular membrane and a fixed electrode with a central hole leading to a backing cavity. A linear analytical model for membrane displacement was derived using a multimodal approach, while a nonlinear model from the literature was used to relate the membrane displacement to the output voltage of the microphone. Experimental measurements of the nonlinear output of the transducer were conducted. A harmonic correction method from the literature was used to linearize the acoustic pressure incident on the transducer's membrane. These measurements were compared with theoretical predictions. The dependence of the first, second, and third harmonics of the output voltage on the input acoustic pressure level was analyzed. The results show good agreement between theoretical predictions and experimental data, particularly for the first and second harmonics, demonstrating the effectiveness of the proposed model in capturing the nonlinear characteristics of condenser microphones.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

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

7

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

—