Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 3 of 3 for “"Acoustic absorbers"”.
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Sound absorption performance of EFBMF panel for building acoustic material
… synthetic materials have been widely used as acoustic absorbers for building. However their adverse effects to humans and the environment have led to the use of natural materials. This research aims to introduce two sources of natural fibers from palm oil residues as an acoustic material. …
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Control of sound transmission into payload fairings using distributed vibration absorbers and Helmholtz resonators
… is composed of optimally damped vibration absorbers (DVA) and optimally damped Helmholtz resonators (HR). A fully coupled structural-acoustic model of a composite cylinder excited by an external plane wave is developed as a first approximation of the system. A modal expansion method is used …
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Étude de l'effet de la polydispersité des matériaux granulaires recyclés sur l'absorption acoustique dans une large bande de fréquence
Le contexte acoustique global entraine des impacts sur le confort écologique, économique et social. Au Québec, le coût environnemental du bruit s’élève à 679 M$ selon les bilans de INSPQ. Exposés à des hauts niveaux de bruits qui dépassent les réglementations dont le développement technologique et …