An analytical model for broadband sound transmission loss of a Finite Single Leaf Wall using a two degree of freedom resonant Metamaterial

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    Abstract

    Acoustic metamaterials (AM) have emerged as an academic discipline within the last decade. Metamaterials can exhibit high transmission loss at low frequencies despite having low mass per unit area. This paper investigates the possibility of using AMs for increasing the sound insulation of finite single leaf walls (SLW), focusing on the coincidence effect problem. Formulas are derived using a variational technique for the forced sound transmission of finite SLW with a coupled array of two degree of freedom resonators. An analytical model is presented and the effects of the band gap in sound transmission and radiation are analyzed and compared to the single degree of freedom case. Moreover, numerical simulations verify the two degree of freedom model. Finally, some conclusions are drawn regarding the effectiveness of the proposed model, possible applications, and future work.
    Original languageEnglish
    Title of host publicationProceedings of 23rd International Congress on Acoustics
    Number of pages8
    PublisherDeutsche Gesellschaft für Akustik e.V.
    Publication date2019
    Pages2091-2098
    ISBN (Print)978-3-939296-15-7
    Publication statusPublished - 2019
    Event23rd International Congress on Acoustics - Eurogress, Aachen , Germany
    Duration: 9 Sept 201913 Sept 2019
    http://www.ica2019.org/

    Conference

    Conference23rd International Congress on Acoustics
    LocationEurogress
    Country/TerritoryGermany
    CityAachen
    Period09/09/201913/09/2019
    Internet address

    Keywords

    • Sound Insulation
    • Transmission
    • Metamaterial

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