JPS5856560A - Loudspeaker telephone set - Google Patents
Loudspeaker telephone setInfo
- Publication number
- JPS5856560A JPS5856560A JP15391281A JP15391281A JPS5856560A JP S5856560 A JPS5856560 A JP S5856560A JP 15391281 A JP15391281 A JP 15391281A JP 15391281 A JP15391281 A JP 15391281A JP S5856560 A JPS5856560 A JP S5856560A
- Authority
- JP
- Japan
- Prior art keywords
- volume
- switch circuit
- switch
- sound volume
- voice
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
- H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、受話音量調節器を有する拡声電話機に関する
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a loudspeaker telephone having a volume control device.
従来、この種の拡声電話機において、非常に静かな環境
で使用するときや、他人に話をあまり聞かれたくないと
きには２通常の使用状態における適正音量よりさらに受
話音量を下げたいという要求があった。このような要求
を単に１個の調節器で実現しようとした場合次に述べる
ような問題が生じ、拡声電話機の性能を悪化させるとい
う欠点があった。Conventionally, when using this type of loudspeaker telephone in a very quiet environment or when you do not want others to hear what you are saying, there has been a demand for lowering the listening volume even further than the appropriate volume under normal usage conditions. . If such requirements were to be met with just one controller, the following problems would arise and the performance of the loudspeaker telephone would deteriorate.
つまり、受話音量を従来の適正音量よりさらに低下させ
た場合、これに伴って音声スイッチ回路の入力も低下し
、該音声スイッチ回路の動作が不安定になり、受話が途
切れたり、ひいては全く聞えなくなる。また音声スイッ
チ回路の方式によっては、受話通話路の挿入損失も大き
くなり９通話品質を悪化させることもある。In other words, if the receiving volume is lowered further than the conventional appropriate volume, the input to the audio switch circuit will also decrease, causing the operation of the audio switching circuit to become unstable, resulting in interruptions in receiving calls, or even inability to hear them at all. . Furthermore, depending on the type of voice switch circuit, the insertion loss of the receiving communication path may also become large, resulting in deterioration of speech quality.
本発明の目的は、従来の拡声電話機の性能を悪化させる
ことなく受話音量を最適音量よりさらに低下させるとい
うことを可能にした拡声電話機を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a loudspeaker telephone that makes it possible to lower the listening volume further than the optimum volume without deteriorating the performance of conventional loudspeaker telephones.
すなわち本発明は、受話音ｉｔ連続的に変えることがで
きる音量調節器と、受話音量を段階的に（すなわちステ
ップ的に）変えることができる音量切替器とを併せ有し
、該音量切替器は。That is, the present invention has both a volume controller that can change the reception sound continuously and a volume switch that can change the reception volume in stages (that is, in steps), and the volume switch has the following features: .
受話音声スイッチ回路の後段に設けられ、かつ該音量切
替器は、音声スイッチ回路が受話状態の時には受話音量
の低減動作をし、上記音声スイッチ回路が送話状態の時
には受話音量の低減動作を停止するように、上記音声ス
イッチ回路の動作と連動する構成であることを特徴とす
る拡声電話機である。The volume switch is provided at a subsequent stage of the receiving audio switch circuit, and the volume switch operates to reduce the receiving volume when the audio switch circuit is in the receiving state, and stops reducing the receiving volume when the audio switch circuit is in the transmitting state. The present invention is a loudspeaker telephone characterized in that it is configured to operate in conjunction with the operation of the voice switch circuit.
次に本発明の実施例について図面を用いて説明する。Next, embodiments of the present invention will be described using the drawings.
第１図を参照すると、送話通話路は、マイクロホン１．
マイクアンプ２．送話音声スイッチ回路６．送話アンプ
４．／・イブリッド回路５を介して、線路端子１４に接
続され、構成される。Referring to FIG. 1, the outgoing communication path includes microphones 1.
Microphone amplifier 2. Transmission voice switch circuit 6. Transmission amplifier 4. / is configured and connected to the line terminal 14 via the hybrid circuit 5.
一方、受話通話路は、線路端子１４よりノ・イブリッド
回路５を介して、受話アンプ６．音鼠調節器７．受話音
声スイッチ回路８．音量切替器９．スビーカアンゾ１０
．スピーカ１１により構成される。On the other hand, the receiving communication path is connected from the line terminal 14 through the hybrid circuit 5 to the receiving amplifier 6. Sound Rat Adjuster 7. Receiving voice switch circuit 8. Volume switch9. Subika Anzo 10
．． It is composed of a speaker 11.
また音声スイッチ回路１５は、比較回路１６゜送話音声
スイッチ回路６．受話音声スイッチ回路８にて構成する
。比較回路１３は端子Ｓおよび端子Ｒの信号レベルの大
きさを比較し、端子Ｓの信号レベルが端子Ｒの信号レベ
ルより大きい場合、送話音声スイッチ回路６および受話
音声スイッチ回路８を送話状態（送話通話路の利得が犬
となり受話通話路の利得が小となる状態）に制御する。The audio switch circuit 15 includes a comparison circuit 16, a transmit audio switch circuit 6. It consists of a receiving voice switch circuit 8. The comparison circuit 13 compares the signal levels of the terminals S and R, and if the signal level of the terminal S is higher than the signal level of the terminal R, the transmitting audio switch circuit 6 and the receiving audio switch circuit 8 are set to the transmitting state. (a state in which the gain of the transmitting channel is high and the gain of the receiving channel is small).
逆に、端子Ｒの信号レベルが端子Ｓの信号レベルより大
きい場合、送話音声スイッチ回路３および受話音声スイ
ッチ回路８を受話状態（受話通話路の利得が犬となり送
話通話路の利得が小となる状態）に制御する。さらに比
較回路１６の出力は、音量切替器９に含まれる音量切替
停止回路１２に接続されている。Conversely, when the signal level of the terminal R is higher than the signal level of the terminal S, the transmitting voice switch circuit 3 and the receiving voice switch circuit 8 are placed in the receiving state (the gain of the receiving channel becomes dog and the gain of the transmitting channel becomes small). ). Further, the output of the comparison circuit 16 is connected to a volume switching stop circuit 12 included in the volume switch 9.
音量切替停止Ｆ回路１２ば、音声スイッチ回路１５が送
話状態のときにスイッチＯＦＦの動作をし、逆に、音声
スイッチ回路１５が受話状態のときにスイッチＯＮの動
作をするよう比較回路１６の出力によシ制御される。The volume switching stop F circuit 12 operates to turn the switch OFF when the audio switch circuit 15 is in the transmitting state, and conversely, to turn the switch ON when the audio switch circuit 15 is in the receiving state. Controlled by output.
また、第１図において、１６は非常Ｖこ静かな環境で使
用する時や、他人に話をあまり聞かれたくない時に操作
されるとスイッチＯＮとなるスイッチである。Further, in FIG. 1, numeral 16 is a switch that is turned on when operated in a very quiet environment or when you do not want others to hear what you are saying.
スイッチ１６および音量切替停止回路１２が両方ともス
イッチＯＮのとき、受話通話路は抵抗１７を介してアー
スに接続される。When the switch 16 and the volume change stop circuit 12 are both turned on, the receiving communication path is connected to ground via the resistor 17.
第１図のごとく９回路を構成することにより。By configuring nine circuits as shown in Figure 1.
音声スイッチ回路１５が受話状態のときのみ音量切替器
９は受話音量の低減動作をすることになり、従ってスピ
ーカ１１からの受話音量は。Only when the audio switch circuit 15 is in the receiving state, the volume switch 9 operates to reduce the receiving volume, so that the receiving volume from the speaker 11 is as follows.
音Ｍ４−調節器７と音量切替器９Ｖこより通常の使用状
態における最適受話音敏よりさらに低下させることがで
きるようになる。かつ、音量切替器９による受話音量低
減量は音声スイッチ回路１５の人力に関係しないため、
該音声スイッチ回路１５は安定に動作し、！、た音声ス
イッチ回路１５が送話状態のときには、盲動調節器７の
調節量だけが挿入される。したがって通話品質が悪化す
ることはない。The sound M4-adjuster 7 and the volume switch 9V can further reduce the optimum reception sensitivity under normal usage conditions. In addition, since the amount of reduction in the volume of the received call by the volume switch 9 is not related to the human power of the audio switch circuit 15,
The voice switch circuit 15 operates stably! , when the voice switch circuit 15 is in the transmitting state, only the adjustment amount of the blind adjustment regulator 7 is inserted. Therefore, the call quality will not deteriorate.
なお本実施例では説明の都合上、受話音量切替器９は一
段にしか変化しないよう記述されているが、多段に変化
するもの（例えばスイッチ１６と抵抗１７との直列回路
を複数組にして互いに並列に接続する。〃いに抵抗の値
は異ならせる。）も、当然本発明に含まれるものである
。Note that in this embodiment, for convenience of explanation, the earphone volume switch 9 is described as changing in only one stage, but it is described as changing in multiple stages (for example, multiple sets of series circuits of a switch 16 and a resistor 17 are connected to each other). Of course, the present invention also includes connection in parallel (with different resistance values).
本発明は以」二説明したように、拡声電話機の性能全悪
化させることなく、受話音量を通常の使用状態における
最適音量よりさらに低下させるこ、と全可能にする効果
がある。As explained above, the present invention has the effect of making it possible to lower the receiving volume further than the optimum volume under normal usage conditions without deteriorating the performance of the loudspeaker telephone.
第１図は本発明による拡声電話機の一実施例を示すブロ
ック図である。
１・・・マイクロホン、２・・マイクアンプ。
６・・・送話音声スイッチ回路、４・・・送話ア／グ。
５・・・ハイブリッド回路、 ６・・・受話アンプ。
７・・・音量調節器、８・・・受話音声スイッチ回路。
９・・・音量切替器、１０・・・スピーカアンプ。
１１・・・スピーカ、１２・・・音量切替停止回路。
１３・・・比較回路、１４・・・線路端子。
１５・・・音声スイッチ回路、１６・・・スイッチ。
１７・・・抵抗。FIG. 1 is a block diagram showing an embodiment of a loudspeaker telephone according to the present invention. 1...Microphone, 2...Mic amplifier. 6... Sending voice switch circuit, 4... Sending voice a/g. 5... Hybrid circuit, 6... Receiving amplifier. 7... Volume adjuster, 8... Receiving audio switch circuit. 9...Volume switch, 10...Speaker amplifier. 11...Speaker, 12...Volume switching stop circuit. 13...Comparison circuit, 14...Line terminal. 15...Audio switch circuit, 16...Switch. 17...Resistance.
Claims (1)
とができる音声調節器と、受話音量を段階的に変えるこ
とができる音量切替器とを併せ有することを特徴とする
拡声電話機。 ２、音量切替器が受話音声スイッチ回路の後段に設けら
れてい゛る特許請求の範囲第１項記載の拡声電話機。 ６、音量切替器は、音声スイッチ回路が受話状態の時１
７］ｄ受話音量の低減動作をし、上記音声スイッチ回路
が送話状態の時には受話音量の低減動作を停止するよう
に、上記音声スイッチ回路の動作と連動する構成である
特許請求の範囲第１項又は第２項記載の拡声電話機。 以下余白[Claims] 1. A loudspeaker telephone set that is characterized by having both an audio adjuster that can continuously change the volume of the received voice and a volume switch that can change the volume of the voice received in stages. telephone. 2. The loudspeaker telephone according to claim 1, wherein the volume switch is provided at a stage subsequent to the receiving audio switch circuit. 6. The volume switch is set to 1 when the voice switch circuit is in the receiving state.
7] d The device is configured to operate in conjunction with the operation of the voice switch circuit so that the voice switch circuit performs an operation to reduce the volume of the voice reception, and stops the operation of reducing the voice volume when the voice switch circuit is in the transmitting state. A loudspeaker telephone set forth in paragraph or paragraph 2. Margin below
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15391281A JPS5856560A (en) | 1981-09-30 | 1981-09-30 | Loudspeaker telephone set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15391281A JPS5856560A (en) | 1981-09-30 | 1981-09-30 | Loudspeaker telephone set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5856560A true JPS5856560A (en) | 1983-04-04 |
Family
ID=15572814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15391281A Pending JPS5856560A (en) | 1981-09-30 | 1981-09-30 | Loudspeaker telephone set |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5856560A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60134358U (en) * | 1984-02-17 | 1985-09-06 | 明星電気株式会社 | Hands-free telephone level comparison circuit |
-
1981
- 1981-09-30 JP JP15391281A patent/JPS5856560A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60134358U (en) * | 1984-02-17 | 1985-09-06 | 明星電気株式会社 | Hands-free telephone level comparison circuit |
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