JPS6458199A - Multi-point electronic silence system - Google Patents
Multi-point electronic silence systemInfo
- Publication number
- JPS6458199A JPS6458199A JP62214840A JP21484087A JPS6458199A JP S6458199 A JPS6458199 A JP S6458199A JP 62214840 A JP62214840 A JP 62214840A JP 21484087 A JP21484087 A JP 21484087A JP S6458199 A JPS6458199 A JP S6458199A
- Authority
- JP
- Japan
- Prior art keywords
- control
- optical
- optical fiber
- picking
- noise
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE:To attain sure silence effect and simplify wiring by interposing an optical fiber cable to a signal path among 1st and 2nd sensors and an additional sound generating means and a control means, decreasing the number of signal lines picking up noise so as to apply accurate control. CONSTITUTION:Input/output interfaces 26, 36, 46, digital filters 27, 37, 47 and a control section 50 are connected by optical MODEMs 28a, 38a, 48a, optical fiber cables 29, 39, 49 and optical MODEMs 28b, 38b, 48b. As a result, picking up of noise and disturbed control do not take place in the path of the optical signal. Thus, silence effect is ensured. Since optical fiber cables 29, 39, 49 are used for wires in ducts 20, 30, 40, and control rooms installed with digital filters 27, 37, 47 and the control section 50, the wiring among them is simplified.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62214840A JPS6458199A (en) | 1987-08-28 | 1987-08-28 | Multi-point electronic silence system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62214840A JPS6458199A (en) | 1987-08-28 | 1987-08-28 | Multi-point electronic silence system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6458199A true JPS6458199A (en) | 1989-03-06 |
Family
ID=16662410
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62214840A Pending JPS6458199A (en) | 1987-08-28 | 1987-08-28 | Multi-point electronic silence system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6458199A (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5737998A (en) * | 1980-08-13 | 1982-03-02 | Sony Corp | Microphone device |
JPS61296392A (en) * | 1985-06-26 | 1986-12-27 | 日立プラント建設株式会社 | Electronic silencing system |
JPS62164400A (en) * | 1986-01-14 | 1987-07-21 | Hitachi Plant Eng & Constr Co Ltd | Electronic silencer system |
-
1987
- 1987-08-28 JP JP62214840A patent/JPS6458199A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5737998A (en) * | 1980-08-13 | 1982-03-02 | Sony Corp | Microphone device |
JPS61296392A (en) * | 1985-06-26 | 1986-12-27 | 日立プラント建設株式会社 | Electronic silencing system |
JPS62164400A (en) * | 1986-01-14 | 1987-07-21 | Hitachi Plant Eng & Constr Co Ltd | Electronic silencer system |
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