Measurement of absorption with a p-u sound intensity probe in an impedance tube

Yang Liu, Finn Jacobsen

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    Abstract

    An alternative method of measuring the normal-incidence sound absorption of a sample of material in an impedance tube is examined. The method is based on measurement of the sound pressure and the normal component of the particle velocity using a "p-u" sound intensity probe. This technique is compared with the traditional, well-established "transfer function method" based on two pressure microphones. The results suggest that the new method can be as accurate as the established method, but whereas the influence of transducer mismatch on the transfer function method can be eliminated using a simple "sensor-switching technique," the method based on a p-u intensity probe relies on accurate calibration of the probe.
    Original languageEnglish
    JournalAcoustical Society of America. Journal
    Volume118
    Issue number4
    Pages (from-to)2117-2120
    ISSN0001-4966
    DOIs
    Publication statusPublished - 2005

    Bibliographical note

    Copyright (2005) Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America.

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