Title:
ELECTRONIC MUFFLING SYSTEM
Document Type and Number:
Japanese Patent JP3634162
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To eliminate an adverse effect on the muffling effect caused by switching microphones from current use to reserve utilization.
SOLUTION: In the system, sound waves from an exhaust duct 1 taken out by a reference microphone 3 and an error microphone 5 are processed to generate muffling sound waves from a secondary sound source 4. At least one of the microphones 3 and 5 consist of current and reserve microphones 18 and 19. The microphones 18 and 19 are mounted to the tip part of the remainder of a T shaped microphone holder 13 one end of which is fixed to the duct 1.
Inventors:
Yasuhiko Shirakami
Application Number:
JP27984998A
Publication Date:
March 30, 2005
Filing Date:
October 01, 1998
Export Citation:
Assignee:
TOA Co., Ltd.
International Classes:
G10K11/16; F24F13/02; G10K11/178; (IPC1-7): G10K11/16; F24F13/02; G10K11/178
Domestic Patent References:
| JP8512410A | ||||
| JP9319381A | ||||
| JP9105321A |
Attorney, Agent or Firm:
Kazuo Shamoto
Shosuke Imai
Tadashi Masui
Tadahiko Kurita
Yasushi Kobayashi
Hideo Tanaka
Shosuke Imai
Tadashi Masui
Tadahiko Kurita
Yasushi Kobayashi
Hideo Tanaka
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