Design of a single layer micro-perforated sound absorber by finite element analysis

Onen O., ÇALIŞKAN M.

APPLIED ACOUSTICS, cilt.71, sa.1, ss.79-85, 2010 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 71 Sayı: 1
  • Basım Tarihi: 2010
  • Doi Numarası: 10.1016/j.apacoust.2009.07.012
  • Dergi Adı: APPLIED ACOUSTICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.79-85
  • Anahtar Kelimeler: Micro-perforated absorber, Composite materials, Acoustic impedance, Finite element method, ACOUSTIC ABSORPTION, PANEL, MEMBRANE
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

Micro-perforated sound absorbers with sub-millimeter size holes can provide high absorption coefficients. This paper presents results of work on the development of an effective single layer micro-perforated sound absorber from the commercial composite material Parabeam (R) with micro diameter holes drilled on one side. Parabeam (R) is used as a structural material made from a fabric woven out of a E-glass yarn and consists of two decklayers bonded together by vertical piles in a sandwich structure with piles (thick fibers) woven into the decklayers. The paper includes, the analytical model developed for prediction of absorption coefficients, finite element solution using commercial software MSC.ACTRAN and experimental results obtained from impedance tube measurements. A simple optimization is performed based on the developed models to obtain an efficient absorber configuration. It has been anticipated that several different and interesting applications can be deduced by combining structural and sound absorption properties of this new micro-perforated absorber. (C) 2009 Elsevier Ltd. All rights reserved.