Designing an array for performing Near-field Acoustic Holography with a small number of p-u probes

Daniel Fernandez Comesaña, Junjie Wen, Efren Fernandez Grande

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

    Abstract

    Near-field acoustic holography (NAH) enables the reconstruction of an entire three-dimensional wave field using data acquired near the sources of sound. An array of sensors can be used in combination with NAH techniques for tackling both time-stationary and transient noise problems. However, such approaches usually require that a large number of transducers is spatially distributed over the area of interest. This paper describes some practical considerations for the design and optimization of a compact sensor array for performing NAH with a small number of sound intensity p-u probes. Two sensor geometries based on hexagonal lattice and polar sampling are assessed and compared to a regular square grid via Monte Carlo simulations accounting for multiple source configurations. Results show that transducer placement plays an important role in the robustness and accuracy of the results, specially in terms of particle velocity reconstructions.
    Original languageEnglish
    Title of host publicationProceedings of INTER-NOISE 2016
    EditorsWolfgang Kropp
    Number of pages8
    PublisherGerman Acoustical Society (DEGA)
    Publication date2016
    Pages5895-5902
    ISBN (Electronic) 978-3-939296-11-9
    Publication statusPublished - 2016
    Event45th International Congress and Exposition on Noise Control Engineering - Hamburg, Germany
    Duration: 21 Aug 201624 Aug 2016
    Conference number: 45
    http://www.internoise2016.org/

    Conference

    Conference45th International Congress and Exposition on Noise Control Engineering
    Number45
    Country/TerritoryGermany
    CityHamburg
    Period21/08/201624/08/2016
    Internet address

    Keywords

    • Array Design
    • NAH
    • p-u probe

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