Title:
NOISE CONTROLLER
Document Type and Number:
Japanese Patent JPH0869290
Kind Code:
A
Abstract:
PURPOSE: To reduce the noise of an engine generator surrounded by a soundproofing case.
CONSTITUTION: A loud speaker 8 generating a cancel sound is arranged on a prescribed position close to an intake 5 in the soundproofing case 2, and a remaining sound collection microphone 10 is arranged in the vicinity of a discharge port 9. Then, by carrying the cancel sound on cooling wind inhaled from the intake 5 and directly hitting the cancel sound to an engine 3 itself being a noise source, an engine noise is reduced, and by providing the intake 5 in a soundless band area S by wind, the matter that the cancel sound of the loud speaker 8 is heard outside of the soundproofing case 2 is prevented.
More Like This:
| JPH1074091 | ACTIVE FUFFLER |
| JPH0836390 | SPEAKER DEVICE FOR ELECTRONIC MUFFLER |
| JPH04183912 | EXHAUST NOISE REDUCING DEVICE OF ENGINE |
Inventors:
ITOU HIROAKI
OKAZAKI MASAO
NISHIKAWA KOZO
OKAZAKI MASAO
NISHIKAWA KOZO
Application Number:
JP20474794A
Publication Date:
March 12, 1996
Filing Date:
August 30, 1994
Export Citation:
Assignee:
KUBOTA KK
International Classes:
F01N1/00; F02B63/04; F02B77/13; G10K11/178; (IPC1-7): G10K11/178; F01N1/00; F02B63/04; F02B77/13
Attorney, Agent or Firm:
Juichi Chatan
Next Patent: MUFFLER