A Low-Cost Intensity Probe

R. Raangs, W.F. Druyvesteyn, H.E. de Bree

    Research output: Contribution to journalArticleAcademicpeer-review

    43 Citations (Scopus)


    Unlike ordinary microphones, a sound intensity probe measures the energy flow as a vector direction. It can be computed as the product of scalar pressure and vector velocity. In a conventional probe, velocity is computed as the difference in pressure at a small fixed distance. The authors propose a novel means of directly measuring velocity using the temperature difference between two heated wires mounted in a microminiaturized substrate. When combined with a standard pressure sensor, the probe measures sound intensity over the full spectrum at a single point in space. The paper provides examples of several methods for calibration of the particle velocity sensor used, such as in a standing-wave tube, reverberant room, anechoic space, and reverberation room. Two examples of sound-intensity measurements are provided and are compared with a conventional sound intensity probe.
    Original languageEnglish
    Pages (from-to)344-357
    Number of pages13
    JournalJournal of the Audio Engineering Society
    Issue number5
    Publication statusPublished - 2003


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    • A low cost Intensity Probe

      Raangs, R., Druyvesteyn, E. & de Bree, H-E., 12 May 2001, Proceedings of the 110th Convention Audio Engineering Society. Amsterdam, The Netherlands: Audio Engineering Society, p. 1-11 11 p. 5292

      Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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