Temperature effects on condenser microphone's mecano-acoustic properties : experimental characterization

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F19%3A00333365" target="_blank" >RIV/68407700:21230/19:00333365 - isvavai.cz</a>

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RIV/68407700:21260/19:00333365

Výsledek na webu

<a href="http://pub.dega-akustik.de/ICA2019/data/articles/000978.pdf" target="_blank" >http://pub.dega-akustik.de/ICA2019/data/articles/000978.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Temperature effects on condenser microphone's mecano-acoustic properties : experimental characterization

Popis výsledku v původním jazyce

Condenser microphones are generally designed for airborne acoustic measurements. Their accurate behaviour is then well understood almost in atmospheric conditions. However, more and more applications, such as acoustic thermometry, gas metrology or thermoacoustics for example, require the use of electrostatic transducers (as sound source or sensors) in gas conditions far from atmospheric ones. A previous experiment using the electrostatic actuator technique already evidenced the influence of static pressure and nature of the gas on a condenser microphones’s frequency response. The same technique is carried out here to characterize the mechanical properties of a 1/4’’ microphone’s membrane in vacuum at temperatures from about 80 K to 300 K. From the results then obtained, the resonance properties of the membrane are expressed as function of the temperature. Then they can be used in global mecano-acoustic modellings of condenser microphones which validity at several temperatures is experimentally checked too. Furthermore, a new global modelling of a condenser microphone coupled to an electrostatic actuator is developed here. Finally, the expected impacts of this work are to provide improved theoretical bases and advanced experimental tools for the deep understanding, the calibration and the design of new electrostatic transducers dedicated to new specific applications.

Název v anglickém jazyce

Temperature effects on condenser microphone's mecano-acoustic properties : experimental characterization

Popis výsledku anglicky

Condenser microphones are generally designed for airborne acoustic measurements. Their accurate behaviour is then well understood almost in atmospheric conditions. However, more and more applications, such as acoustic thermometry, gas metrology or thermoacoustics for example, require the use of electrostatic transducers (as sound source or sensors) in gas conditions far from atmospheric ones. A previous experiment using the electrostatic actuator technique already evidenced the influence of static pressure and nature of the gas on a condenser microphones’s frequency response. The same technique is carried out here to characterize the mechanical properties of a 1/4’’ microphone’s membrane in vacuum at temperatures from about 80 K to 300 K. From the results then obtained, the resonance properties of the membrane are expressed as function of the temperature. Then they can be used in global mecano-acoustic modellings of condenser microphones which validity at several temperatures is experimentally checked too. Furthermore, a new global modelling of a condenser microphone coupled to an electrostatic actuator is developed here. Finally, the expected impacts of this work are to provide improved theoretical bases and advanced experimental tools for the deep understanding, the calibration and the design of new electrostatic transducers dedicated to new specific applications.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20303 - Thermodynamics

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the 23rd International Congress on Acoustics, integrating 4th EAA Euroregio 2019

ISBN

978-3-939296-15-7

ISSN

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e-ISSN

2226-7808

Počet stran výsledku

6

Strana od-do

7369-7374

Název nakladatele

Deutsche Gesellschaft für Akustik

Místo vydání

Dresden

Místo konání akce

Aachen

Datum konání akce

9. 9. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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