Acoustical performance of Helmholtz resonators used as vehicular silencers.

dc.contributor.authorMartins, Lucas Rodrigues
dc.contributor.authorGuimarães, Gustavo Paulinelli
dc.contributor.authorFragassa, Cristiano
dc.date.accessioned2019-04-02T15:22:06Z
dc.date.available2019-04-02T15:22:06Z
dc.date.issued2018
dc.description.abstractThis study proposes to evaluate the acoustical performance of a reactive vehicular silencer made entirely of Helmholtz resonator. Four or seven resonators are idealized to be in a series configuration, all the dimensions except cavity length and resonators are fixed. An algorithm processes inputted characteristic engine noise signal obtained from literature, identify peaks, and calculates ideal cavity length for attenuation. The transmission loss of the system is analytically calculated. Attenuation levels obtained are satisfactory. The required volume of the resonator to achieve the same resonance frequency as low frequency noise peak demands impractical cavity length, proving it to be flawed. It is suggested to use resonators of two or three different diameter for different frequency range in order to overcome this problem.pt_BR
dc.identifier.citationMARTINS, L. R.; GUIMARÃES, G. P.; FRAGASSA, C. Acoustical performance of Helmholtz resonators used as vehicular silencers. FME Transactions, v. 46, p. 497-502, 2018. Disponível em: <https://www.mas.bg.ac.rs/_media/istrazivanje/fme/vol46/4/8_lr_martins_et_al.pdf>. Acesso em: 15 fev. 2019.pt_BR
dc.identifier.issn14512092
dc.identifier.urihttp://www.repositorio.ufop.br/handle/123456789/10900
dc.identifier.uri2https://www.mas.bg.ac.rs/_media/istrazivanje/fme/vol46/4/8_lr_martins_et_al.pdfpt_BR
dc.language.isoen_USpt_BR
dc.rightsrestritopt_BR
dc.subjectVehicular exhaust systempt_BR
dc.subjectNoise attenuationpt_BR
dc.subjectMufflerpt_BR
dc.subjectReactive silencerpt_BR
dc.titleAcoustical performance of Helmholtz resonators used as vehicular silencers.pt_BR
dc.typeArtigo publicado em periodicopt_BR

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