Broad omnidirectional acoustic band gaps in a three-dimensional phononic crystal composed of face-centered cubic Helmholtz resonator network
Küçük Resim Yok
Tarih
2021
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Acoustical Soc Amer Amer Inst Physics
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Broad omnidirectional band gaps in a three-dimensional phononic crystal consisting of a face-centered cubic array of spherical air voids connected by cylindrical conduits in solid background are numerically and experimentally demonstrated. With a low material filling fraction of 37.7%, the first bandgap covers 3.1-13.6 kHz frequency range with 126.1% gap-over-midgap ratio. Finite-element method is employed in band structure and numerical transmission analyses. Omnidirectional band gaps are observed in only two-period thick slabs in the 100, 110, and 111 orientations. Experimental transmission characteristics are in good agreement with numerical data. The phononic crystal can be employed in low-frequency sound proofing.& nbsp;(C) 2021 Acoustical Society of America
Açıklama
Anahtar Kelimeler
[No Keywords]
Kaynak
Journal of The Acoustical Society of America
WoS Q Değeri
Q2
Scopus Q Değeri
Q1
Cilt
150
Sayı
3
