Thin structured rigid body for acoustic absorption
Starkey, TA; Smith, JD; Hibbins, AP; et al.Sambles, JR; Rance, HJ
Date: 23 January 2017
Journal
Applied Physics Letters
Publisher
AIP Publishing
Publisher DOI
Abstract
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 ...
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.
Physics and Astronomy
Faculty of Environment, Science and Economy
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