Thin structured rigid body for acoustic absorption Article Swipe
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Timothy A. Starkey
,
Johan Smith
,
Alastair P. Hibbins
,
J. R. Sambles
,
Helen J. Rance
·
YOU?
·
· 2017
· Open Access
·
· DOI: https://doi.org/10.1063/1.4974487
· OA: W2581334366
YOU?
·
· 2017
· Open Access
·
· DOI: https://doi.org/10.1063/1.4974487
· OA: W2581334366
We present a thin acoustic metamaterial absorber, comprised of only rigid metal and air, that gives rise to near unity absorption of airborne sound on resonance. This simple, easily fabricated, robust structure comprising a perforated metal plate separated from a rigid wall by a deeply subwavelength channel of air is an ideal candidate for a sound absorbing panel. The strong absorption in the system is attributed to the thermo-viscous losses arising from a sound wave guided between the plate and the wall, defining the subwavelength channel.
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