Disorder in a periodic Helmholtz resonators array

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Abstract

This paper considers the disorder in a periodic duct-resonator system. The transfer matrix method is used to investigate wave propagation in the duct. Two cases are investigated: the disorder in periodic distance and the disorder in the geometries of Helmholtz resonators. Different from the original attenuation characteristic brought about by pure periodic system, it is found that the disorder in the geometries of resonators with the periodic distance being kept unchanged provides a useful way for the design of such a system to achieve a relatively wide noise attenuation band and to track some narrow noise peaks within it.
Original languageEnglish
Pages (from-to)1-5
Number of pages5
JournalApplied Acoustics
Volume82
DOIs
Publication statusPublished - 1 Jan 2014

Keywords

  • Forbidden band
  • Helmholtz resonator
  • Noise control
  • Periodic structure

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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