FEM/BEM modeling of microphones and its application to acoustic primary metrology

Vicente Cutanda Henríquez, Manuel Sobreira Seoane

Publikation: Bidrag til bog/antologi/rapport/konference-proceedingKonferencebidrag i proceedingsForskningpeer review

Resumé

Acoustic primary calibration of microphones under free-field conditions is performed by reciprocity, using microphones in pairs, one working as emitter and the other as receiver. The microphones are placed in an anechoic chamber. Considering the extreme accuracy required in this kind of measurement, every minute detail of the setup must be considered. In this framework, numerical modeling of the inside of the microphones and the outside domain can provide important clues for understanding the behavior of the system and finding ways of improving its performance, that is, reducing its uncertainty. This is especially needed at high frequencies, where the diaphragms have a complex movement and the wavelength becomes comparable to the size of the microphones. The usual assumptions, such as considering the microphones as point sources, are invalid in that range. The paper will deal with a coupled numerical implementation of this kind of measurement, taking into account the internal losses in the microphone, the diaphragm movement and the coupling with the exterior.
OriginalsprogEngelsk
TitelProceedings of Inter-Noise 2003 : http://www.i-ince.org/
Antal sider6
ForlagThe International Institute of Noise Control Engineering
Publikationsdato2003
Sider671-676
StatusUdgivet - 2003
Udgivet eksterntJa
BegivenhedInter-Noise 2003 - Seogwipo, Sydkorea
Varighed: 25. aug. 200328. aug. 2003
Konferencens nummer: 32

Konference

KonferenceInter-Noise 2003
Nummer32
LandSydkorea
BySeogwipo
Periode25/08/200328/08/2003

Fingeraftryk

microphones
metrology
acoustics
diaphragms
anechoic chambers
point sources
emitters
receivers
wavelengths

Citer dette

Cutanda Henríquez, V., & Sobreira Seoane, M. (2003). FEM/BEM modeling of microphones and its application to acoustic primary metrology. I Proceedings of Inter-Noise 2003: http://www.i-ince.org/ (s. 671-676). The International Institute of Noise Control Engineering.
Cutanda Henríquez, Vicente ; Sobreira Seoane, Manuel. / FEM/BEM modeling of microphones and its application to acoustic primary metrology. Proceedings of Inter-Noise 2003: http://www.i-ince.org/. The International Institute of Noise Control Engineering, 2003. s. 671-676
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abstract = "Acoustic primary calibration of microphones under free-field conditions is performed by reciprocity, using microphones in pairs, one working as emitter and the other as receiver. The microphones are placed in an anechoic chamber. Considering the extreme accuracy required in this kind of measurement, every minute detail of the setup must be considered. In this framework, numerical modeling of the inside of the microphones and the outside domain can provide important clues for understanding the behavior of the system and finding ways of improving its performance, that is, reducing its uncertainty. This is especially needed at high frequencies, where the diaphragms have a complex movement and the wavelength becomes comparable to the size of the microphones. The usual assumptions, such as considering the microphones as point sources, are invalid in that range. The paper will deal with a coupled numerical implementation of this kind of measurement, taking into account the internal losses in the microphone, the diaphragm movement and the coupling with the exterior.",
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Cutanda Henríquez, V & Sobreira Seoane, M 2003, FEM/BEM modeling of microphones and its application to acoustic primary metrology. i Proceedings of Inter-Noise 2003: http://www.i-ince.org/. The International Institute of Noise Control Engineering, s. 671-676, Inter-Noise 2003, Seogwipo, Sydkorea, 25/08/2003.

FEM/BEM modeling of microphones and its application to acoustic primary metrology. / Cutanda Henríquez, Vicente; Sobreira Seoane, Manuel.

Proceedings of Inter-Noise 2003: http://www.i-ince.org/. The International Institute of Noise Control Engineering, 2003. s. 671-676.

Publikation: Bidrag til bog/antologi/rapport/konference-proceedingKonferencebidrag i proceedingsForskningpeer review

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N2 - Acoustic primary calibration of microphones under free-field conditions is performed by reciprocity, using microphones in pairs, one working as emitter and the other as receiver. The microphones are placed in an anechoic chamber. Considering the extreme accuracy required in this kind of measurement, every minute detail of the setup must be considered. In this framework, numerical modeling of the inside of the microphones and the outside domain can provide important clues for understanding the behavior of the system and finding ways of improving its performance, that is, reducing its uncertainty. This is especially needed at high frequencies, where the diaphragms have a complex movement and the wavelength becomes comparable to the size of the microphones. The usual assumptions, such as considering the microphones as point sources, are invalid in that range. The paper will deal with a coupled numerical implementation of this kind of measurement, taking into account the internal losses in the microphone, the diaphragm movement and the coupling with the exterior.

AB - Acoustic primary calibration of microphones under free-field conditions is performed by reciprocity, using microphones in pairs, one working as emitter and the other as receiver. The microphones are placed in an anechoic chamber. Considering the extreme accuracy required in this kind of measurement, every minute detail of the setup must be considered. In this framework, numerical modeling of the inside of the microphones and the outside domain can provide important clues for understanding the behavior of the system and finding ways of improving its performance, that is, reducing its uncertainty. This is especially needed at high frequencies, where the diaphragms have a complex movement and the wavelength becomes comparable to the size of the microphones. The usual assumptions, such as considering the microphones as point sources, are invalid in that range. The paper will deal with a coupled numerical implementation of this kind of measurement, taking into account the internal losses in the microphone, the diaphragm movement and the coupling with the exterior.

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Cutanda Henríquez V, Sobreira Seoane M. FEM/BEM modeling of microphones and its application to acoustic primary metrology. I Proceedings of Inter-Noise 2003: http://www.i-ince.org/. The International Institute of Noise Control Engineering. 2003. s. 671-676