Measurements and calculations of the sound attenuation by a phononic band gap structure suitable for an insulating partition application

Cecile Goffaux, Fabrizio Maseri, Barhan Djafari-Rouhani, Philippe Lambin

    Research output: Contribution to journalArticle

    Abstract

    We report a strong attenuation of sound waves in a phononic band gap crystal of steel rods arranged in air. We investigate the attenuation level reached in the gaps for finite thickness samples. We show that a bypassing of sound waves by the sides of the sample are responsible for the observed saturation of the attenuation level in the gaps. Beyond this effect, we demonstrate the improvement of the acoustic insulation performance brought about by the periodicity of the crystal in comparison with the so-called mass law.
    Original languageEnglish
    Pages (from-to)281-283
    Number of pages3
    JournalApplied Physics Letters
    Volume83
    Issue number2
    DOIs
    Publication statusPublished - 2003

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