(19)
(11) EP 1 229 167 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
14.05.2003 Bulletin 2003/20

(43) Date of publication A2:
07.08.2002 Bulletin 2002/32

(21) Application number: 01128191.2

(22) Date of filing: 27.11.2001
(51) International Patent Classification (IPC)7: E01B 19/00
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 01.02.2001 JP 2001025136

(71) Applicants:
  • National Traffic Safety and Environment Laboratory
    Tokyo, 182-0012 (JP)
  • Ogata, Seigo, National Traffic Safety and Environment Laboratory
    Tokyo, 182-0012 (JP)
  • Mitsubishi Heavy Industries, Ltd.
    Tokyo (JP)

(72) Inventors:
  • Ogata, Seigo, National Traffic Safety & Environ.
    Chofu, Tokyo, 182-0012 (JP)
  • Hasezaki, Kazuhiro, Nagasaki Research & Dev. Cent.
    5-chome, Nagasaki, Nagasaki-ken (JP)
  • Motomura, Hikaru, Nagasaki Research & Dev. Center
    5-chome, Nagasaki, Nagasaki-ken (JP)
  • Shibata, Seizou, Nagasaki Shipyard & Machine. Work
    Nagasaki, Nagasaki-ken (JP)
  • Kawami, Masayuki, Nagasaki Shipyard & Machin. Work
    Nagasaki, Nagasaki-ken (JP)
  • Seki, Shiro, Nagasaki Shipyard & Machinery Work
    Nagasaki, Nagasaki-ken (JP)

(74) Representative: Henkel, Feiler, Hänzel 
Möhlstrasse 37
81675 München
81675 München (DE)

   


(54) Sound absorbing construction for track


(57) The sound absorbing construction for track which reduces a noise generated from a portion under the floor of a vehicle, of noises generated from a track, is characterized in that a thin sound absorbing plate (1) with a high impact strength is provided on a track close to the sound source or near a track.






Search report