123 MULTI-LAYERED POLYURETHANE FOAMS FOR FLAT-WALLED ANECHOIC LININGS(O.S.3 Noise and Sound Control II)

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概要

• 論文の詳細を見る

• The concept of flat-walled multi-layered absorbent linings for anechoic rooms was proposed three decades ago. With the advantage of being less complicated and, hence, less costly to manufacture and install than the individual units such as wedges, it is an alternative to the more conventional wedge-type system. However, there are difficulties in optimising the design of such absorbent linings. Previous work showed that an evolutionary algorithm could be successfully employed as an optimiser to aid and speed up the design process of the flat-walled anechoic linings. In the present work, such an algorithm is employed to investigate the application of multi-layered polyurethane foams as the flat-walled anechoic lining. The investigation includes aspects such as a) the effect of the number of layers on the minimum thickness required for a given cut-off frequency, and b) the possible minimum thicknesses of a three-layer system required for achieving cut-off frequencies between 100Hz and 400Hz.

• 一般社団法人日本機械学会の論文
• 2005-05-31

著者

• Fricke Fergus

  School Of Architecture Design Science And Planning University Of Sydney

• XU Jingfeng

  School of Architecture, Design Science and Planning, University of Sydney

• BUCHOLZ Jorg

  MARCS Auditory Laboratories, University of Western Sydney

• Bucholz Jorg

  Marcs Auditory Laboratories University Of Western Sydney

• Xu Jingfeng

  School Of Architecture Design Science And Planning University Of Sydney

関連論文

• 123 MULTI-LAYERED POLYURETHANE FOAMS FOR FLAT-WALLED ANECHOIC LININGS(O.S.3 Noise and Sound Control II)

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