An Analytical Model for Broadband Sound Transmission Loss of a Finite Single Leaf Wall using a Metamaterial

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    Abstract

    Acoustic metamaterials (AM) have emerged as an academic discipline within the last decade. When used for sound insulation, metamaterials can show 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 single degree of freedom resonators. An analytical model is presented for this simple case, and the effects of the band gap in sound transmission and radiation are analysed. Moreover, the influence of each parameter is studied giving way to an optimized way of designing this type of structures using constrained parameter optimization. Different objective functions are compared and discussed. Finally, some conclusions are drawn regarding the effectiveness of the proposed model, possible applications, and future
    work.
    Original languageEnglish
    Title of host publicationProceedings of internoise 2019
    Number of pages13
    PublisherInternational Institute of Noise Control Engineering
    Publication date2019
    Article number2184
    ISBN (Print)978-84-87985-31-7
    Publication statusPublished - 2019
    Event48th International Congress and Exhibition on Noise Control Engineering - Palacio Municipal de Congresos de Madrid, Madrid, Spain
    Duration: 16 Jun 201919 Jun 2019
    Conference number: 48
    https://internoise2019.org/

    Conference

    Conference48th International Congress and Exhibition on Noise Control Engineering
    Number48
    LocationPalacio Municipal de Congresos de Madrid
    Country/TerritorySpain
    CityMadrid
    Period16/06/201919/06/2019
    Internet address

    Keywords

    • Sound-Insulation
    • Metamaterial
    • Analytical

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