Is there a systematic disagreement between intensity-based and pressure-based sound transmission loss measurements?

Maria Machimbarrena, Finn Jacobsen

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    Conventional and intensity-based sound transmission loss measurements have frequently been compared in the literature. Looking at published results determined under laboratory conditions, one would come to the conclusion that it is only possible to obtain good agreement between the two methods in a very limited frequency range. The purpose of this paper is to demonstrate with experimental data that excellent agreement can be obtained in a fairly large frequency range (80 Hx to 6.3 kHz) provided that the measurement are carried out in adequate facilities. As pointed out by several researchers, the only reason for systematic deviations between the two methods is the effect of having a partition that is highly absorbing in the receiving room.
    Original languageEnglish
    JournalJournal of Building Acoustics
    Issue number2
    Pages (from-to)101-111
    Publication statusPublished - 1999

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