Title:
NOISE REDUCTION SYSTEM FOR RAILWAY VEHICLE
Document Type and Number:
WIPO Patent Application WO/2023/157379
Kind Code:
A1
Abstract:
The present invention is a noise reduction system 1 for a railway vehicle for reducing, at a plurality of silencing positions 10 in a railway vehicle 100, noise propagated from a noise source in the exterior of the railway vehicle 100, the plurality of silencing positions 10 being positions that are different in the longitudinal direction of the vehicle, the noise reduction system 1 for a railway vehicle comprising a noise reference sensor 20 for detecting noise propagated from the noise source and/or vibration caused by the noise, and a plurality of silencing devices 30 for respectively reducing noise at each of the plurality of silencing positions 10. Each silencing device 30 is provided with a speaker 31 for emitting sound at the respective silencing position 10 and a control unit 32 for outputting a control signal to cause the speaker 31 to radiate sound such that noise at the respective silencing position 10 is reduced. The noise reference sensor 20 is installed at the same position as, or at a position farther to the front of the vehicle than, the silencing position 10 that is located farthest to the front of the vehicle from among the plurality of silencing positions 10, with respect to the longitudinal direction of the vehicle. Each of the plurality of control units 32 generates the control signal using a reference signal outputted from the noise reference sensor 20.
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Inventors:
TSUCHIYA HIROKI (JP)
OKUDA NOBUYOSHI (JP)
UEDA YOSHIKI (JP)
OKUDA NOBUYOSHI (JP)
UEDA YOSHIKI (JP)
Application Number:
PCT/JP2022/039311
Publication Date:
August 24, 2023
Filing Date:
October 21, 2022
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
G10K11/178; B61D49/00
Foreign References:
| JPH04334653A | 1992-11-20 | |||
| JP2011020474A | 2011-02-03 | |||
| JPH09160567A | 1997-06-20 |
Attorney, Agent or Firm:
WISEPLUS IP FIRM (JP)
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