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Influence of uncertain parameters on the acoustic behaviour of sound proofing laminates
KTH, School of Engineering Sciences (SCI), Engineering Mechanics, Fluid Mechanics and Engineering Acoustics, Marcus Wallenberg Laboratory MWL. KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.ORCID iD: 0000-0001-9071-6325
KTH, School of Engineering Sciences (SCI), Engineering Mechanics, Fluid Mechanics and Engineering Acoustics, Marcus Wallenberg Laboratory MWL. KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.ORCID iD: 0000-0003-1855-5437
2019 (English)In: INTER-NOISE 2019 MADRID - 48th International Congress and Exhibition on Noise Control Engineering, SOCIEDAD ESPANOLA DE ACUSTICA - Spanish Acoustical Society, SEA , 2019Conference paper, Published paper (Refereed)
Abstract [en]

The protection against excessive noise has gathered a lot of attention along the years. Tailored solutions for specific types of noise conditions emerged and many communications on the subject are published every year. Although designing sound proofing systems is a well developed topic, building the proposed systems is still subject to many uncertainties. For instance, the very nature of the foams used in many broadband absorbers implies a degree of uncertainty on some of the most important parameters (e.g. the airflow resistivity). This phenomenon is even more noticeable in modern sound absorbing laminates in which every interface implies a barely controllable change in the continuity conditions. This effect being rarely accounted for and the interfaces' properties hard to quantify, it adds uncertainties that are widely neglected even though having a potentially strong impact. In this contribution, the effect of randomly distributed parameters on the overall acoustic response of multi-layer systems is considered. The influence of choosing specific acoustic models for each layer is emphasized and the resulting response envelope is studied.

Place, publisher, year, edition, pages
SOCIEDAD ESPANOLA DE ACUSTICA - Spanish Acoustical Society, SEA , 2019.
Keywords [en]
Acoustic absorbers, Poro-elastic materials, Screens, Uncertainty
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-268572Scopus ID: 2-s2.0-85077703510ISBN: 9788487985317 (print)OAI: oai:DiVA.org:kth-268572DiVA, id: diva2:1428705
Conference
48th International Congress and Exhibition on Noise Control Engineering, INTER-NOISE 2019 MADRID, 16 June 2019 through 19 June 2019
Note

QC 20200506

Available from: 2020-05-06 Created: 2020-05-06 Last updated: 2020-05-06Bibliographically approved

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Gaborit, MathieuGöransson, Peter

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