JPH0426237A - Dark noise detecting method and automatic level control loud-speaking system for sound field - Google Patents
Dark noise detecting method and automatic level control loud-speaking system for sound fieldInfo
- Publication number
- JPH0426237A JPH0426237A JP13027190A JP13027190A JPH0426237A JP H0426237 A JPH0426237 A JP H0426237A JP 13027190 A JP13027190 A JP 13027190A JP 13027190 A JP13027190 A JP 13027190A JP H0426237 A JPH0426237 A JP H0426237A
- Authority
- JP
- Japan
- Prior art keywords
- sound
- signal
- speaking
- dark noise
- loud
- 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
- 230000005236 sound signal Effects 0.000 abstract 4
Abstract
PURPOSE: To easily monitor the level of dark noise in a sound field by comparing the sound field monitor signal of a sound field monitoring sound collector with a line signal in proportion to the output of an amplifier to drive a loudspeaker, obtaining a loud-speaking sound signal after separating the same waveform component,and using the difference between the sound field monitor signal and the loud-speaking sound signal as a dark noise signal.
CONSTITUTION: A sound field monitor sound collector 3 is provided to extract the line signal in proportion to the output from an amplifier to drive a loudspeaker 4 in a sound field 20, and to sense a loud-speaking tone from the loudspeaker 4 in the sound field 20 and the dark noise of the sound field 20. Then, the loud-speaking sound signal is formed after separating the same waveform component as the waveform of the line signal in the output of the sound field monitor sound collector 3, and the difference between the output of the sound field monitor sound collector 3 and the loud-speaking sound signal is used as the dark noise signal so as to detect the level of the dark noise signal. Thus, the level of the dark noise in the sound field can be easily detected.
COPYRIGHT: (C)1992,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13027190A JPH0426237A (en) | 1990-05-22 | 1990-05-22 | Dark noise detecting method and automatic level control loud-speaking system for sound field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13027190A JPH0426237A (en) | 1990-05-22 | 1990-05-22 | Dark noise detecting method and automatic level control loud-speaking system for sound field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0426237A true JPH0426237A (en) | 1992-01-29 |
Family
ID=15030310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13027190A Pending JPH0426237A (en) | 1990-05-22 | 1990-05-22 | Dark noise detecting method and automatic level control loud-speaking system for sound field |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0426237A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0832227A (en) * | 1994-07-19 | 1996-02-02 | Nitto Kogaku Kk | Connection method for board |
| JP2009021658A (en) * | 2007-07-10 | 2009-01-29 | Yamaha Corp | Sound emission and collection device |
| JP2010217807A (en) * | 2009-03-19 | 2010-09-30 | Dainichi Denshi:Kk | Voice issuing state determination device |
| CN112208686A (en) * | 2020-09-16 | 2021-01-12 | 纳恩博（天津）科技有限公司 | Data processing method and electric motorcycle |
-
1990
- 1990-05-22 JP JP13027190A patent/JPH0426237A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0832227A (en) * | 1994-07-19 | 1996-02-02 | Nitto Kogaku Kk | Connection method for board |
| JP2009021658A (en) * | 2007-07-10 | 2009-01-29 | Yamaha Corp | Sound emission and collection device |
| JP2010217807A (en) * | 2009-03-19 | 2010-09-30 | Dainichi Denshi:Kk | Voice issuing state determination device |
| CN112208686A (en) * | 2020-09-16 | 2021-01-12 | 纳恩博（天津）科技有限公司 | Data processing method and electric motorcycle |
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