Title:
【発明の名称】吸音材およびその製造方法
Document Type and Number:
Japanese Patent JP2522604
Kind Code:
B2
Abstract:
The improved sound absorbing material (10) comprises an aluminum base expanded metal (12) (or an aluminum base metal screen) which is laminated with an aluminum base metal foil (16) (or a thin resin film), or additionally with an aluminum base metal fiber layer (14). The aluminum base metal foil (16) (or thin resin film) has ruptures, which vibrate in the process of sound absorption to permit the sound absorbing material to exhibit excellent sound-absorbing characteristics over a broad frequency range. The improved sound absorbing material can be produced by a process which comprises the steps of preparing a laminate comprising the members described above and pressing the laminate so that the individual members are compressed together while forming ruptures in a regular pattern in the aluminum base metal foil (or thin resin film).
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Inventors:
MORIMOTO TOORU
Application Number:
JP33429990A
Publication Date:
August 07, 1996
Filing Date:
November 30, 1990
Export Citation:
Assignee:
YUNITSUKUSU KK
MORIMOTO TOORU
MORIMOTO TOORU
International Classes:
E01F8/00; E04B1/84; E04B1/86; G10K11/172; (IPC1-7): G10K11/172; E01F8/00; E01F8/02; E04B1/86
Attorney, Agent or Firm:
Nobuto Watanabe (1 person outside)