JPS61189616U - - Google Patents
Info
- Publication number
- JPS61189616U JPS61189616U JP7259785U JP7259785U JPS61189616U JP S61189616 U JPS61189616 U JP S61189616U JP 7259785 U JP7259785 U JP 7259785U JP 7259785 U JP7259785 U JP 7259785U JP S61189616 U JPS61189616 U JP S61189616U
- Authority
- JP
- Japan
- Prior art keywords
- sound
- volume
- changing
- notification sound
- maximum level
- 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
- 238000010586 diagram Methods 0.000 description 3
- 230000005236 sound signal Effects 0.000 description 2
Landscapes
- Control Of Amplification And Gain Control (AREA)
- Circuits Of Receivers In General (AREA)
Description
第１図および第２図は本考案の一実施例におけ
る音量可変回路を説明するためのもので、第１図
は同回路を備えた拡声装置の回路構成図、第２図
は音量変化特性を示す図、第３図および第４図は
本考案の他の実施例における音量可変回路を説明
するためのもので、第３図は同回路を備えた拡声
装置の回路構成図、第４図は音量変化特性を示す
図、第５図は従来の音量可変回路の音量変化特性
を示す図である。
１……報知音信号入力端子、２……音声信号入
力端子、３……スピーカ、４……スピーカ駆動回
路、５……電子ボリウム、５１……第１のアツテ
ネータ、５２……第２のアツテネータ、５３……
制御回路、５０……手動操作式のボリウム、５０
１……第１の可変抵抗器、５０２……第２の可変
抵抗器、６……制御信号入力端子、７，１０……
報知音の最小音量を設定するための抵抗、８，９
……バイアス抵抗。
Figures 1 and 2 are for explaining a volume variable circuit according to an embodiment of the present invention. Figure 1 is a circuit diagram of a loudspeaker system equipped with the same circuit, and Figure 2 shows volume variation characteristics. 3 and 4 are for explaining a volume variable circuit according to another embodiment of the present invention, and FIG. 3 is a circuit configuration diagram of a loudspeaker system equipped with the same circuit, and FIG. FIG. 5 is a diagram showing the volume change characteristics of a conventional volume variable circuit. DESCRIPTION OF SYMBOLS 1...Notification sound signal input terminal, 2...Audio signal input terminal, 3...Speaker, 4...Speaker drive circuit, 5...Electronic volume, 51...First attenuator, 52...Second attenuator , 53...
Control circuit, 50... Manually operated volume, 50
1... First variable resistor, 502... Second variable resistor, 6... Control signal input terminal, 7, 10...
Resistor for setting the minimum volume of notification sound, 8, 9
...Bias resistance.
Claims (1)
出する拡声装置の音量可変回路において、前記音
声の送出音量を零から所定の最大レベルまで変化
させる第１の手段と、この第１の手段と連動し前
記報知音の送出音量を聴取可能な所定の最少レベ
ルから最大レベルまで変化させる第２の手段とを
具備したことを特徴とする音量可変回路。 In a volume variable circuit of a public address system that transmits a sound and a notification sound separate from the sound, a first means for changing the volume of the sound from zero to a predetermined maximum level; and a first means interlocked with the first means. and second means for changing the output volume of the notification sound from a predetermined minimum audible level to a maximum level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7259785U JPS61189616U (en) | 1985-05-16 | 1985-05-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7259785U JPS61189616U (en) | 1985-05-16 | 1985-05-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61189616U true JPS61189616U (en) | 1986-11-26 |
Family
ID=30611152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7259785U Pending JPS61189616U (en) | 1985-05-16 | 1985-05-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61189616U (en) |
-
1985
- 1985-05-16 JP JP7259785U patent/JPS61189616U/ja active Pending
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