Journal
JOURNAL OF VIBRATION AND CONTROL
Volume 28, Issue 15-16, Pages 1928-1936Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/10775463211001183
Keywords
Acoustic metasurface; noise; ventilation; silencer; sound transmission loss
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This article introduces a novel metasurface design methodology for sound silencing in the ultrawide band of frequencies, showing the potential for noise reduction in residential and office settings as well as enabling ultralow noise fan, propellers, and machinery.
In this article, we have first presented a metasurface design methodology by coupling the acoustic cavity to the coiled channel. The geometrical design parameters in this structure are subsequently studied both analytically and numerically to identify a road map for silencer design. Next, upon tuning the design parameters, we have introduced an air-permeable noise barrier capable of sound silencing in the ultrawide band of the frequency. It is has been shown that the presented metasurface can achieve +10 dB sound transmission loss from 170 Hz to 1330 Hz (approximate to 3 octaves). Furthermore, we have numerically studied the ventilation and heat transfer performance of the designed metasurface. Enabling noise mitigation by leveraging the proposed metasurface opens up new possibilities ranging from residential and office noise reduction to enabling ultralow noise fan, propellers, and machinery.
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