Elford et al Acoustic Band Gap Formation in Metamaterials.pdf (458.23 kB)
Acoustic band gap formation in metamaterials
journal contributionposted on 2011-02-09, 12:23 authored by Daniel Elford, Luke Chalmers, Feodor Kusmartsev, Gerry Swallowe
We present several new classes of metamaterials and/or locally resonant sonic crystal that are comprised of complex resonators. The proposed systems consist of multiple resonating inclusion that correspond to different excitation frequencies. This causes the formation of multiple overlapped resonance band gaps.We demonstrate theoretically and experimentally that the individual band gaps achieved, span a far greater range ( 2kHz) than previously reported cases. The position and width of the band gap is independent of the crystal’s lattice constant and forms in the low frequency regime significantly below the conventional Bragg band gap. The broad envelope of individual resonance band gaps is attractive for sound proofing applications and furthermore the devices can be tailored to attenuate lower or higher frequency ranges, i.e. from seismic to ultrasonic.
CitationELFORD, D.P. ... et al, 2010. Acoustic band gap formation in metamaterials. International Journal of Modern Physics B, 24 (25-26), pp. 4935-4945.
Publisher© World Scientific Publishing Company
- AM (Accepted Manuscript)
NotesThis is an electronic version of an article published in the International Journal of Modern Physics B [© World Scientific Publishing Company].