Analytical modeling of dissipative silencers

Venegas, R; Arenas, JP; Boutin, C

Abstract

This paper applies ideas originally developed in the field of acoustics of multiscale porous media to
the analytical modeling of dissipative silencers. Analytical models for the long-wavelength acoustical
properties of different types of dissipative silencers, such as pod silencers, lined ducts, splitters,
and bar silencers, are introduced in this work. Some of these models account for the possibility of
using different porous materials in a given silencer. For instance, a model for a splitter silencer
comprising baffles made of different porous materials is derived. Examples of the sound transmission
behavior of the said types of silencers are presented to evidence that the dissipation of sound
energy is largely influenced by pressure diffusion occurring in the porous constituents. The predictions
of the analytical models are in good agreement with finite element calculations.

Citation

Venegas, R., Arenas, J., & Boutin, C. (2018). Analytical modeling of dissipative silencers. ˜The œJournal of the Acoustical Society of America (Online), 144(5), 2998-3009. https://doi.org/10.1121/1.5078607

• Journal Article Type: Article
• Acceptance Date: Oct 25, 2018
• Online Publication Date: Nov 28, 2018
• Publication Date: Nov 28, 2018
• Deposit Date: Mar 14, 2019
• Journal: The Journal of the Acoustical Society of America
• Print ISSN: 0001-4966
• Volume: 144
• Issue: 5
• Pages: 2998-3009
• DOI: https://doi.org/10.1121/1.5078607
• Publisher URL: https://doi.org/10.1121/1.5078607
• Related Public URLs: https://asa.scitation.org/journal/jas