Title:
NOISE REDUCER IN VEHICLE CABIN
Document Type and Number:
Japanese Patent JPH0659690
Kind Code:
A
Abstract:
PURPOSE: To provide a noise reducer for cabin noise reduction which is improved to efficiently reduce noise in a high frequency band.
CONSTITUTION: A noise reducer, which generates a signal in the same amplitude and the opposite phase of noise input to a microphone 1 by using an applicable filter 5 to reduce cabin noise, is provided with a microphone 1 set up on a ceiling above a seat to output a control signal to the applicable filter 5, a low- band 3 set up under the seat to generate low-band noise from the applicable filter 5 and a high-band speaker 3 set up on the ceiling above the seat to generate high-band noise from the applicable filter 5.
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Inventors:
TAMAMURA MANPEI
SHIBATA EIJI
NOHARA MANABU
SHIBATA EIJI
NOHARA MANABU
Application Number:
JP21583092A
Publication Date:
March 04, 1994
Filing Date:
August 13, 1992
Export Citation:
Assignee:
FUJI HEAVY IND LTD
PIONEER ELECTRONIC CORP
PIONEER ELECTRONIC CORP
International Classes:
F01N1/00; B60R11/02; G10K11/16; G10K11/178; (IPC1-7): G10K11/16; F01N1/00
Attorney, Agent or Firm:
Hideo Takino (1 outside)
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