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Wednesday, July 10 • 15:30 - 15:50
PASSIVE CONTROL SOUND TRANSMISSION THROUGH DOUBLE-PLATE STRUCTURES BY USING MASS-SPRING-DAMPER SYSTEM

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It is well-known that the acoustic performance of double-plate structures deteriorates rapid-ly around the mass-air-mass resonance frequency. In this paper, a mass-spring-damper (MSD) system connected between incident and radiating plate is used to control the sound transmission in low frequency ranges. A full structural-acoustic coupling modal model is developed to analyze the vibroacoustic behaviour of the double-plate structures with MSD system. And the numerical calculation results are presented. The calculated results show that, tuning the natural frequency of the MSD system exact to the mass-air-mass resonance frequency cannot guarantee the maximum improvement on transmission loss. Optimal nat-ural frequency depends on the mass of the MSD system. The calculation results also show that the sound transmission loss of a double-plate structure can be improved significantly by using optimally tuned MSD system. In presented results indicate that an overall im-provement 12 dB below 1000 Hz can be achieved when the mass of the MSD system equals to 10% weight of the double-plate structure.

Moderators
FA

francesco Asdrubali

Full Professor, Università Roma Tre - Department of Engineering
TD

Thomas Dupont

Associate Professor, École de Technologie Supérieure (ÉTS)
PL

Philippe Leclaire

Prof., ISAT - University of Burgundy
avatar for Raymond Panneton

Raymond Panneton

Ing., Ph.D., GAUS, Université de Sherbrooke
Raymond Panneton is a professor-researcher in the Department of Mechanical Engineering at the Université de Sherbrooke since 1998. His research program focuses on the modeling, characterization and optimization of porous acoustic media. More specifically, he explores the relationships... Read More →

Authors

Wednesday July 10, 2019 15:30 - 15:50 EDT
St-Laurent 5
  T08 Mat. for noise & vibr. cntrl., SS01 Pasv snd absorb & insul mtrl