Publication result detail

Application of MEMS microphone array for acoustic holography

HAVRÁNEK, Z.; BENEŠ, P.; KLUSÁČEK, S.

Original Title

Application of MEMS microphone array for acoustic holography

English Title

Application of MEMS microphone array for acoustic holography

Type

Paper in proceedings (conference paper)

Original Abstract

The paper shows the overall potential and applicability of microphone arrays equipped with MEMS miniature capacitive microphones for use with near-field acoustic holography algorithms to visualize and localize sound sources. Comprehensive test of double layer rectangular matrix microphone array and several acoustic holography algorithms has been carried out to find weaknesses of proposed MEMS array technology in practical measurement conditions including complex sources and disturbing sound field. Test setups include determination of secondary (disturbing) source strength, influence of distance of the primary and secondary sources and also measurement array stand-off distance on prediction accuracy of localization and characterization of sound and vibration sources. Attention is also focused on available signal-to-noise ratio of sound pressure measurement with applied MEMS microphones and its influence on determination of regularization parameters for inverse acoustic holography calculation. Drawbacks of complex or even unfeasible calibration procedure for such MEMS transducers also influence the presented prediction accuracy results in practical measurements.

English abstract

The paper shows the overall potential and applicability of microphone arrays equipped with MEMS miniature capacitive microphones for use with near-field acoustic holography algorithms to visualize and localize sound sources. Comprehensive test of double layer rectangular matrix microphone array and several acoustic holography algorithms has been carried out to find weaknesses of proposed MEMS array technology in practical measurement conditions including complex sources and disturbing sound field. Test setups include determination of secondary (disturbing) source strength, influence of distance of the primary and secondary sources and also measurement array stand-off distance on prediction accuracy of localization and characterization of sound and vibration sources. Attention is also focused on available signal-to-noise ratio of sound pressure measurement with applied MEMS microphones and its influence on determination of regularization parameters for inverse acoustic holography calculation. Drawbacks of complex or even unfeasible calibration procedure for such MEMS transducers also influence the presented prediction accuracy results in practical measurements.

Keywords

acoustic holography, MEMS microphone, microphone arrays

Key words in English

acoustic holography, MEMS microphone, microphone arrays

Authors

HAVRÁNEK, Z.; BENEŠ, P.; KLUSÁČEK, S.

RIV year

2016

Released

31.05.2015

Publisher

European Acoustics Association

Location

Maastricht, Belgie

Book

Proceedings of Euronoise 2015

ISBN

2226-5147

Periodical

Proceedings - European Conference on Noise Control

Volume

2015

State

unknown

Pages from

919

Pages to

924

Pages count

6

BibTex

@inproceedings{BUT115829,
  author="Zdeněk {Havránek} and Petr {Beneš} and Stanislav {Klusáček}",
  title="Application of MEMS microphone array for acoustic holography",
  booktitle="Proceedings of Euronoise 2015",
  year="2015",
  journal="Proceedings - European Conference on Noise Control",
  volume="2015",
  pages="919--924",
  publisher="European Acoustics Association",
  address="Maastricht, Belgie",
  issn="2226-5147"
}