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Random Incidence Absorption and Transmission Loss Testing and Modeling of Microperforated Composites
Technical Paper
2011-01-1626
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Flat, constant thickness composites that consisted of a microperforated top layer plus a fibrous decoupler layer were tested for random absorption and transmission loss (TL) performance. The top, microperforated layer consisted of a relatively thick film that contained small, precise micro-perforations. For reference, top layers that consisted of a resistive scrim and an impervious film were also included in this study. Two fibrous materials of constant thickness were used for the decoupler layer between a steel panel and the top microperforated film. The composites' absorption and TL performance were also modeled using the well-known transfer matrix method. This method has been implemented in a commercially available statistical energy analysis (SEA) software package. A comparison of testing and modeling results showed reasonable agreement for absorption results and even better agreement for transmission loss and insertion loss results.
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Citation
Alexander, J., Reed, D., and Gerdes, R., "Random Incidence Absorption and Transmission Loss Testing and Modeling of Microperforated Composites," SAE Technical Paper 2011-01-1626, 2011, https://doi.org/10.4271/2011-01-1626.Also In
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