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Monday, July 8 • 11:00 - 13:30
ACOUSTIC PROPAGATION PROPERTIES OF AIR-FILLED PIPE WITH PERIODIC MEMBRANE-TYPE HELMHOLTZ RESONATORS

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The propagation of acoustic waves in an air-filled pipe system with periodic membrane-type Helm-holtz resonators is studied theoretically. And the band structure of infinite periodic cells and trans-mission loss of periodic cells are calculated by the finite element method. Finally, we find that the band and transmission loss can be tunable significantly by adjust the tension. It is useful to obtain a low-frequency and broadband gap in piping systems.

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Monday July 8, 2019 11:00 - 13:30 EDT
St-Laurent 3, Board 09-B
  T08 Mat. for noise & vibr. cntrl., SS03 Ac metamtrl & phon crstl: fund & app