A numerical investigation of the performance of sound intensity probes at high frequencies

Vicente Cutanda, Peter Møller Juhl, Finn Jacobsen

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    Abstract

    The influence of diffraction on the performance of sound intensity probes has been examined using a boundary element model of an axisymmetric 'two-microphone' probe with the microphones in the usual 'face-to-face' arrangement. On the basis of calculations for a variety of sound field conditions and probe geometries it is concluded that the optimum length of the spacer between the microphones is about one microphone diameter; with this geometry the effect of diffraction and the finite difference error almost counterbalance each other up to about an octave above the frequency that has hitherto been regarded as the upper frequency limit of this configuration. The numerical results have been confirmed by experiments.
    Original languageEnglish
    Title of host publicationFourth International Congress on Sound and Vibration
    Place of PublicationAuburn, AL
    PublisherInternational Scientific Publications
    Publication date1996
    Pages1897-1904
    Publication statusPublished - 1996
    Event4th International Congress on Sound and Vibration - St. Petersburg, Russian Federation
    Duration: 24 Jul 199627 Jul 1996
    Conference number: 4

    Conference

    Conference4th International Congress on Sound and Vibration
    Number4
    CountryRussian Federation
    CitySt. Petersburg
    Period24/07/199627/07/1996

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