Broad omnidirectional acoustic band gaps in a three-dimensional phononic crystal composed of face-centered cubic Helmholtz resonator network

Bicer A., KÖRÖZLÜ N., KAYA O. A., ÇİÇEK A.

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, cilt.150, sa.3, ss.1591-1596, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 150 Sayı: 3
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1121/10.0006043
  • Dergi Adı: JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Applied Science & Technology Source, BIOSIS, Compendex, Computer & Applied Sciences, EMBASE, INSPEC, Linguistics & Language Behavior Abstracts, MEDLINE, MLA - Modern Language Association Database, Music Index, zbMATH
  • Sayfa Sayıları: ss.1591-1596
  • İnönü Üniversitesi Adresli: Evet

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