From 1D Transfer Matrix to 3D COMSOL Modeling
This presentation outlines ASCEE’s design methodology for custom duct silencers in exhaust ducts and HVAC systems. To reduce noise without causing flow loss, ASCEE combines reactive resonator chambers for low frequencies with micro-perforated plates (MPP) for the mid- and high-frequency ranges, without using fibrous materials. A 1D transfer matrix with a genetic algorithm first determines the optimal dimensions below the cut-on frequency. COMSOL then models the 3D interaction between resonators, the actual perforations, and transmission loss (TL) through ports, resulting in a minimal silencer size.
Citation for the publication
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Author: Dr. Anne de Jong, M.S. (ASCEE – COMSOL Certified Consultant)
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Conference: COMSOL Conference Online Event
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Date: October 14–15, 2020
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Subject: Duct Acoustics, Hybrid Dampers (MPP and Reactive), Transfer Matrix, and Transmission Loss
