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Tuesday, July 9 • 16:50 - 17:10
SOUND ABSORPTION BY A BIMODAL PORE-SIZE DISTRIBUTION

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Some porous media known as melamine foam absorb sound from their three-dimensional network of thin struts. We show here that their exceptional ability to mitigate sound energy is related to a bimodal pore size distribution, which consists of co-existing pores of distinct characteristic sizes, in which the low frequency and high frequency fluid flow will follow different paths in the pore structure. The design of this visco-inertial dissipative "multi-scale" structure can be tuned on a commercial scale and may find application in improving sound absorption by, for example, a proper modification of the proportion of the chemical agents used to produce a melamine resin foam.

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avatar for Mohammad Rafiee

Mohammad Rafiee

Postdoctoral Fellow, Polytechnique Montréal
Mohammad Rafiee received his Ph.D. degree in Mechanical Engineering from the University of Ottawa in 2018. Currently, he is a Postdoctoral Fellow at Polytechnique Montreal in Canada. His research interests are primarily focused on the development of advanced composite materials, smart... Read More →

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Tuesday July 9, 2019 16:50 - 17:10 EDT
Outremont 6
  T08 Mat. for noise & vibr. cntrl., SS02 Vibr damping materials

Attendees (2)