JPS6458200A - Electronic silence system - Google Patents
Electronic silence systemInfo
- Publication number
- JPS6458200A JPS6458200A JP62214841A JP21484187A JPS6458200A JP S6458200 A JPS6458200 A JP S6458200A JP 62214841 A JP62214841 A JP 62214841A JP 21484187 A JP21484187 A JP 21484187A JP S6458200 A JPS6458200 A JP S6458200A
- Authority
- JP
- Japan
- Prior art keywords
- ram
- coefficient
- convolution
- interrupting
- storage device
- 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.)
- Granted
Links
Landscapes
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
PURPOSE:To eliminate cause to discontinity and noninstantaneousity by providing a storage device for storing two coefficients and a storage device for two input signals to correct a control parameter without interrupting the operation even during the system operation to a control means correcting the control parameter. CONSTITUTION:Sensor microphones M1, M1' clipping an additional sound source S inbetween are arranged in a propagation path 1 at a position where transfer functions Hr, Ht are equivalent to each other. In detecting a propagated sound wave generated from a noise source in the propagation path 1 by the M1, M1', the wave is inputted to an adder circuit 20, and its output signal is fed respectively to a digital filter 29 and a control section 30 via an A/D converter 24. The digital filter 29 has two RAMs for storing coefficients, transfers a new coefficient to the RAM 2 when the RAM 1 is used for convolution and switches the RAM 1 and RAM 2 when the transfer of the coefficient is finished. Thus, the coefficient is revised without interrupting the convolution.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62214841A JPH0727389B2 (en) | 1987-08-28 | 1987-08-28 | Electronic silencing system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62214841A JPH0727389B2 (en) | 1987-08-28 | 1987-08-28 | Electronic silencing system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6458200A true JPS6458200A (en) | 1989-03-06 |
JPH0727389B2 JPH0727389B2 (en) | 1995-03-29 |
Family
ID=16662428
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62214841A Expired - Lifetime JPH0727389B2 (en) | 1987-08-28 | 1987-08-28 | Electronic silencing system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0727389B2 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0336897A (en) * | 1989-07-03 | 1991-02-18 | Hitachi Plant Eng & Constr Co Ltd | Electronic silencing system |
JPH0342999A (en) * | 1989-07-10 | 1991-02-25 | Hitachi Plant Eng & Constr Co Ltd | Silencing device for radiation noise in opening section |
JPH03195296A (en) * | 1989-12-25 | 1991-08-26 | Matsushita Electric Ind Co Ltd | Noise canceller |
JPH0470200A (en) * | 1990-07-10 | 1992-03-05 | Hitachi Plant Eng & Constr Co Ltd | Electronic silencing system |
WO1992022054A1 (en) * | 1991-05-30 | 1992-12-10 | Fujitsu Ten Limited | Noise control apparatus |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59133595A (en) * | 1982-11-26 | 1984-07-31 | ロ−ド・コ−ポレ−シヨン | Active sound attenuator |
JPS62164400A (en) * | 1986-01-14 | 1987-07-21 | Hitachi Plant Eng & Constr Co Ltd | Electronic silencer system |
-
1987
- 1987-08-28 JP JP62214841A patent/JPH0727389B2/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59133595A (en) * | 1982-11-26 | 1984-07-31 | ロ−ド・コ−ポレ−シヨン | Active sound attenuator |
JPS62164400A (en) * | 1986-01-14 | 1987-07-21 | Hitachi Plant Eng & Constr Co Ltd | Electronic silencer system |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0336897A (en) * | 1989-07-03 | 1991-02-18 | Hitachi Plant Eng & Constr Co Ltd | Electronic silencing system |
JPH0342999A (en) * | 1989-07-10 | 1991-02-25 | Hitachi Plant Eng & Constr Co Ltd | Silencing device for radiation noise in opening section |
JPH03195296A (en) * | 1989-12-25 | 1991-08-26 | Matsushita Electric Ind Co Ltd | Noise canceller |
JPH0470200A (en) * | 1990-07-10 | 1992-03-05 | Hitachi Plant Eng & Constr Co Ltd | Electronic silencing system |
WO1992022054A1 (en) * | 1991-05-30 | 1992-12-10 | Fujitsu Ten Limited | Noise control apparatus |
Also Published As
Publication number | Publication date |
---|---|
JPH0727389B2 (en) | 1995-03-29 |
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