JPS6077154U - public address telephone - Google Patents
public address telephoneInfo
- Publication number
- JPS6077154U JPS6077154U JP16872183U JP16872183U JPS6077154U JP S6077154 U JPS6077154 U JP S6077154U JP 16872183 U JP16872183 U JP 16872183U JP 16872183 U JP16872183 U JP 16872183U JP S6077154 U JPS6077154 U JP S6077154U
- Authority
- JP
- Japan
- Prior art keywords
- public address
- path
- audio signal
- acoustic coupling
- address telephone
- 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
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は、本考案の一実施例を示すブロック図である。
１・・・・・・マイクロホン、２・・・・・・マイクロ
ホンアンプ回路、３・・・・・・送話音声スイッチ回路
、４・・・・・・送話アンプ回路、５・・・・・・ハイ
ブリッド回路、６・・・・・・線路端子、７・・・・・
・受話アンプ回路、８・・・・・・受話音声スイッチ回
路、９・・・・・・内蔵スピーカアンプ回路、１０・・
・・・・内蔵スピーカ、１１・・・・・・外部増設スピ
ーカアンプ回路、１２・・・・・・スピーカ端子、１３
・・・・・・外部増設スピーカ、１４・・・・・・比較
回路、１５・・・・・・音響結合量検出回路、１６・・
・・・・制御回路、１７・・・・・・表示器、Ｓ２．Ｓ
７．Ｓ８．Ｓ□５？ Ｓ１６・・・・・・音声信号、π
・・・・・・送話路、ＲＰ・・・・・・受話路。FIG. 1 is a block diagram showing one embodiment of the present invention. 1...Microphone, 2...Microphone amplifier circuit, 3...Talking audio switch circuit, 4...Talking amplifier circuit, 5... ...Hybrid circuit, 6...Line terminal, 7...
- Receiving amplifier circuit, 8... Receiving audio switch circuit, 9... Built-in speaker amplifier circuit, 10...
...Built-in speaker, 11...External extension speaker amplifier circuit, 12...Speaker terminal, 13
......External expansion speaker, 14...Comparison circuit, 15...Acoustic coupling amount detection circuit, 16...
...Control circuit, 17...Display device, S2. S
7. S8. S□5? S16...Audio signal, π
...Sending path, RP...Receiving path.
Claims (1)
を接続できる受話路で構成された拡声電話機において、 前記送話路の音声信号レベルと前記受話路の音声信号レ
ベルとを検出し、あらかじめ設定された通話品質を保つ
ための許容音響結合量のレベルとの比較判定を行ない、
検出信号を発する音響結合量検出回路を設けたことを特
徴とする拡声電話機。[Scope of Claim for Utility Model Registration] In a loudspeaker telephone configured with a sending path having a microphone and a receiving path to which an additional external speaker can be connected, the audio signal level of the sending path and the audio signal level of the receiving path and compares it with the level of permissible acoustic coupling to maintain preset call quality.
A loudspeaker telephone characterized by being provided with an acoustic coupling amount detection circuit that emits a detection signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16872183U JPS6077154U (en) | 1983-10-31 | 1983-10-31 | public address telephone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16872183U JPS6077154U (en) | 1983-10-31 | 1983-10-31 | public address telephone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6077154U true JPS6077154U (en) | 1985-05-29 |
Family
ID=30368785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16872183U Pending JPS6077154U (en) | 1983-10-31 | 1983-10-31 | public address telephone |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6077154U (en) |
-
1983
- 1983-10-31 JP JP16872183U patent/JPS6077154U/en active Pending
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