Title:
【発明の名称】軽量殻音響囲壁
Document Type and Number:
Japanese Patent JPH10501040
Kind Code:
A
Abstract:
PCT No. PCT/GB95/01210 Sec. 371 Date Nov. 26, 1996 Sec. 102(e) Date Nov. 26, 1996 PCT Filed May 24, 1995 PCT Pub. No. WO95/33135 PCT Pub. Date Dec. 7, 1995A lightweight acoustic enclosure (1.1), for the reduction of noise transmission from monopole, quadrapole and higher order noise sources via airborne paths at frequencies lower than the approximate ring frequency of the enclosure (1.1), comprising an approximately spherical shaped enclosure (1.1), which is made from stiff materials to reduce the amount of stretching of the enclosure wall and substantially encases the noise source, all structural paths between the enclosure and the noise source comprising vibration isolation (2.4). The thickness of the enclosure wall can be relatively thin. The enclosure (1.1) can comprise multiple concentric layers of stiff material, ideally with adjacent layers having at least one compliant layer, such as foam rubber, sandwiched between them. The enclosure (1.1) can comprise several component parts such as spherical shell elements (1.2), with radii less than that of the approximate radius of the enclosure (1.1). Additional webbings or flanges (1.3) can be included which either form part of or are used with the component parts to increase the stiffness in the enclosure (1.1). Suitable stiff material can be steel, aluminum, carbon fiber, fiber reinforced resins or any combination of these.
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Inventors:
Pinnington, Roger The Ames
Application Number:
JP50049196A
Publication Date:
January 27, 1998
Filing Date:
May 24, 1995
Export Citation:
Assignee:
United Kingdom
International Classes:
F04B39/00; (IPC1-7): F04B39/00
Attorney, Agent or Firm:
Yoshio Kawaguchi (3 outside)