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Cylindrical Nearfield Acoustical Holography: Practical Aspects and Possible Improvements

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Automotive NVH Technology

Part of the book series: SpringerBriefs in Applied Sciences and Technology ((BRIEFSAUTOENG))

Abstract

This chapter discusses Nearfield Acoustical Holography (NAH) for the characterization of cylindrical sources. Cylindrical NAH is an experimental airborne characterization technique, and it is suited for any type of cylindrical source. NAH allows to evaluate sound intensity, pressure level and particle velocity. Practical aspects of Nearfield Acoustical Holography such as positioning error, measurement noise, hologram distance and measurement aperture are investigated and discussed with the aid of numerical examples. Moreover, a technique referred to as compressive sampling (CS) is discussed, aiming to reduce the number of sensors required by the classical NAH in the high frequency range.

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Acknowledgement

The research work of Matteo Kirchner has been funded by the European Commission within the FP7 EID Marie Curie project “eLiQuiD” (GA 316422). The authors acknowledge the financial support of the “COMET K2—Competence Centres for Excellent Technologies Programme” of the Austrian Federal Ministry for Transport, Innovation and Technology (BMVIT), the Austrian Federal Ministry of Science, Research and Economy (BMWFW), the Austrian Research Promotion Agency (FFG), the Province of Styria and the Styrian Business Promotion Agency (SFG). The IWT Flanders and KU Leuven research fund are also gratefully acknowledged for their support. Finally, the authors gratefully acknowledge the support of COST action TU1105.

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Authors and Affiliations

  1. Virtual Vehicle Research Center, Area NVH and Friction, Inffeldgasse 21/a, 8010, Graz, Austria

    Matteo Kirchner & Eugenius Nijman

  2. Department of Mechanical Engineering, KU Leuven, Celestijnenlaan 300, 3001, Heverlee, Belgium

    Matteo Kirchner

Authors
  1. Matteo Kirchner
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  2. Eugenius Nijman
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Correspondence to Matteo Kirchner .

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Editors and Affiliations

  1. Virtual Vehicle Research Center, Graz, Austria

    Anton Fuchs

  2. Virtual Vehicle Research Center, Graz, Austria

    Eugenius Nijman

  3. Virtual Vehicle Research Center, Graz, Austria

    Hans-Herwig Priebsch

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Kirchner, M., Nijman, E. (2016). Cylindrical Nearfield Acoustical Holography: Practical Aspects and Possible Improvements. In: Fuchs, A., Nijman, E., Priebsch, HH. (eds) Automotive NVH Technology. SpringerBriefs in Applied Sciences and Technology(). Springer, Cham. https://doi.org/10.1007/978-3-319-24055-8_4

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  • DOI: https://doi.org/10.1007/978-3-319-24055-8_4

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-24053-4

  • Online ISBN: 978-3-319-24055-8

  • eBook Packages: EngineeringEngineering (R0)

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