Free-field calibration of MEMS microphone array used for acoustic holography

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F14%3APU110764" target="_blank" >RIV/00216305:26220/14:PU110764 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Free-field calibration of MEMS microphone array used for acoustic holography

Popis výsledku v původním jazyce

The paper deals with method and methodology for calibration of the whole microphone array without the need of dismounting of each microphone and calibrating separately. This situa-tion is usual with MEMS transducers which cannon be dismantled from the frame. The method is based on generation of spherical acoustic wave propagating in free-field and syn-chronously received by all microphones in the array. Relative amplitude and phase calibration can be done by knowledge of propagation, where analytical solution is only available for simple source like monopole, but practical implementation of such source is difficult. Thus, two types of real sources have been tested and compared for suitability. One source was small loudspeaker mounted inside the plasticball with small hole/vent on the surface and second one was commercial omni-source loudspeaker. Practical experiments have been carried out in large anechoic chamber where standard microphone array with laboratory microphones has been us

Název v anglickém jazyce

Free-field calibration of MEMS microphone array used for acoustic holography

Popis výsledku anglicky

The paper deals with method and methodology for calibration of the whole microphone array without the need of dismounting of each microphone and calibrating separately. This situa-tion is usual with MEMS transducers which cannon be dismantled from the frame. The method is based on generation of spherical acoustic wave propagating in free-field and syn-chronously received by all microphones in the array. Relative amplitude and phase calibration can be done by knowledge of propagation, where analytical solution is only available for simple source like monopole, but practical implementation of such source is difficult. Thus, two types of real sources have been tested and compared for suitability. One source was small loudspeaker mounted inside the plasticball with small hole/vent on the surface and second one was commercial omni-source loudspeaker. Practical experiments have been carried out in large anechoic chamber where standard microphone array with laboratory microphones has been us

Druh

D - Stať ve sborníku

CEP obor

JB - Senzory, čidla, měření a regulace

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the 21st International Congress on Sound and Vibration

ISBN

978-83-62652-66-2

ISSN

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e-ISSN

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Počet stran výsledku

8

Strana od-do

1-8

Název nakladatele

Neuveden

Místo vydání

Peking, Čína

Místo konání akce

Peking

Datum konání akce

13. 7. 2014

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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