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Acoustic band gaps in periodically and quasiperiodically modulated waveguides
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King, P. D. C. and Cox, T. J. (2007) Acoustic band gaps in periodically and quasiperiodically modulated waveguides. Journal of Applied Physics, Vol.102 (No.1). Article: 014902. doi:10.1063/1.2749483 ISSN 0021-8979.
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Official URL: http://dx.doi.org/10.1063/1.2749483
Abstract
We report experimental observation of the formation of phononic band structure in one-dimensional periodically and quasiperiodically (based on the Fibonacci and Thue-Morse number sequences) area modulated waveguide structures. The experimental results are compared to model calculations considering the interference of multiply reflected waves using a transfer matrix method formulation. It was found that both the scattering due to the changes in area (causing an impedance discontinuity) and also the radiation impedance acting at each area discontinuity must be considered to accurately model the experimental results. For the quasiperiodic structures, complicated transmission spectra are seen to result, characterized by wide acoustic pseudo-band-gaps interrupted by narrow defect modes around the center of the gap.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QC Physics | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | Journal of Applied Physics | ||||
Publisher: | American Institute of Physics | ||||
ISSN: | 0021-8979 | ||||
Official Date: | 1 July 2007 | ||||
Dates: |
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Volume: | Vol.102 | ||||
Number: | No.1 | ||||
Number of Pages: | 8 | ||||
Page Range: | Article: 014902 | ||||
DOI: | 10.1063/1.2749483 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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