An acoustic double fishnet using Helmholtz resonators
Murray, Alasdair R.J.
Sambles, J. Roy
Hibbins, Alastair P.
Journal of the Acoustical Society of America
Acoustical Society of America
The acoustic transmission of a closely spaced pair of patterned and perforated rigid plates is explored in air. The structure resembles an acoustic double fishnet design, with each plate modified such that the gap between them acts as an array of Helmholtz resonators. This allows the center frequency of the stop band to be reduced by a factor greater than 2 from the value obtained for the conventional acoustic double fishnet design. Experimental results accord well with the predictions of a finite element model.
Engineering and Physical Sciences Research Council (EPSRC)
Copyright © 2014 Acoustical Society of America
Vol. 136 (3), article 980
Place of publication