JPS574608A - Reducing device of music level - Google Patents
Reducing device of music levelInfo
- Publication number
- JPS574608A JPS574608A JP7798580A JP7798580A JPS574608A JP S574608 A JPS574608 A JP S574608A JP 7798580 A JP7798580 A JP 7798580A JP 7798580 A JP7798580 A JP 7798580A JP S574608 A JPS574608 A JP S574608A
- Authority
- JP
- Japan
- Prior art keywords
- attenuator
- music
- attenuation
- pass
- degree
- 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
- 238000012935 Averaging Methods 0.000 abstract 1
- 230000003321 amplification Effects 0.000 abstract 1
- 238000001514 detection method Methods 0.000 abstract 1
- 230000010354 integration Effects 0.000 abstract 1
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Control Of Amplification And Gain Control (AREA)
Abstract
PURPOSE:To reduce selectively only the music level, by inserting an electron control variable attenuator into the signal route of a audible frequency amplifying system and varying the degree of attenuation of the atennuator with the control DC voltage that received a wave detection and integration. CONSTITUTION:An electron control variable attenuator 7 is inserted in the middle of an audible frequency amplifying system. The signal is divided in front of the attenuator 7, and the divided signals are made to pass through a voice band eliminating filter 1. Both the high and low band components of the filter 1 are detected by a wave detector 2 to obtain a DC component and then made to pass through an integral network 3 to receive an averaging for the time fluctuation and then to be amplified up to a proper level through a DC amplifier 4. The output of this amplification is applied to the attenuator 7 in the form of a control voltage. As a result, the degree of attenuation is increased between the input and output to reduce automatically the sound volume only when a music is performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7798580A JPS574608A (en) | 1980-06-10 | 1980-06-10 | Reducing device of music level |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7798580A JPS574608A (en) | 1980-06-10 | 1980-06-10 | Reducing device of music level |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS574608A true JPS574608A (en) | 1982-01-11 |
Family
ID=13649146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7798580A Pending JPS574608A (en) | 1980-06-10 | 1980-06-10 | Reducing device of music level |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS574608A (en) |
-
1980
- 1980-06-10 JP JP7798580A patent/JPS574608A/en active Pending
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