JPS604058U - public address telephone equipment - Google Patents

public address telephone equipment

Info

Publication number
JPS604058U
JPS604058U JP9278383U JP9278383U JPS604058U JP S604058 U JPS604058 U JP S604058U JP 9278383 U JP9278383 U JP 9278383U JP 9278383 U JP9278383 U JP 9278383U JP S604058 U JPS604058 U JP S604058U
Authority
JP
Japan
Prior art keywords
level
received signal
public address
telephone equipment
telephone device
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.)
Granted
Application number
JP9278383U
Other languages
Japanese (ja)
Other versions
JPH039414Y2 (en
Inventor
達 中原
Original Assignee
日本電気株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 日本電気株式会社 filed Critical 日本電気株式会社
Priority to JP9278383U priority Critical patent/JPS604058U/en
Publication of JPS604058U publication Critical patent/JPS604058U/en
Application granted granted Critical
Publication of JPH039414Y2 publication Critical patent/JPH039414Y2/ja
Granted legal-status Critical Current

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

【図面の簡単な説明】[Brief explanation of drawings]

第１図は従来の拡声電話装置の一例のブロック図、第２
図は本考案の実施例のブロック図である。 １・・・・・・マイクロホン、２・・・・・・マイクロ
ホン増幅器、３・・・・・・可変抵抗減衰器、４・・・
・・・送話増幅器、５・・・・・・アナログ−ディジタ
ル変換器、６・・・・・・制御回路、７・・・・・・２
線−４線変換回路、８・・・・・・受話増幅器、９・・
・・・・可変抵抗減衰器、１０・・・・・・スピーカ増
幅器、１１・・・・・・スピーカ、１２・・・・・・整
流回路、１３・・・・・・整流回路、１４・・・・・・
受話人力レベル調節器。Figure 1 is a block diagram of an example of a conventional loudspeaker telephone device;
The figure is a block diagram of an embodiment of the present invention. 1... Microphone, 2... Microphone amplifier, 3... Variable resistance attenuator, 4...
...Transmission amplifier, 5...Analog-digital converter, 6...Control circuit, 7...2
Line-to-4 line conversion circuit, 8... Receiving amplifier, 9...
... Variable resistance attenuator, 10 ... Speaker amplifier, 11 ... Speaker, 12 ... Rectifier circuit, 13 ... Rectifier circuit, 14.・・・・・・
Listener power level adjuster.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] マイクロホンとスピーカとを使用して通話を行ない、マ
イクロ・コンピュータによって通話信号の側御を行なう
拡声電話装置において、受話状態における受話信号レベ
ルの時間的平均レベルを算出し、この時間的平均レベル
が、あらかじめ設定された受話の定格レベルと比較して
一定の範囲を超えて低下している場合に、受話通話路に
挿入された受話人力レベル調節器により、前記定格レベ
ルまで受話信号レベルを上昇制御することを特徴とする
拡声電話装置。In a loudspeaker telephone device that uses a microphone and a speaker to make a call and controls the call signal by a microcomputer, the temporal average level of the received signal level in the receiving state is calculated, and this temporal average level is When the received signal level has decreased beyond a certain range compared to a preset rated level of the received signal, the received signal level is controlled to be raised to the rated level by a receiver power level adjuster inserted in the receiving channel. A loudspeaker telephone device characterized by:
JP9278383U 1983-06-18 1983-06-18 public address telephone equipment Granted JPS604058U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9278383U JPS604058U (en) 1983-06-18 1983-06-18 public address telephone equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9278383U JPS604058U (en) 1983-06-18 1983-06-18 public address telephone equipment

Publications (2)

Publication Number Publication Date
JPS604058U true JPS604058U (en) 1985-01-12
JPH039414Y2 JPH039414Y2 (en) 1991-03-08

Family

ID=30223159

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9278383U Granted JPS604058U (en) 1983-06-18 1983-06-18 public address telephone equipment

Country Status (1)

Country Link
JP (1) JPS604058U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0221846U (en) * 1988-07-13 1990-02-14

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59230355A (en) * 1983-06-14 1984-12-24 Matsushita Electric Ind Co Ltd Hand-free talking device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59230355A (en) * 1983-06-14 1984-12-24 Matsushita Electric Ind Co Ltd Hand-free talking device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0221846U (en) * 1988-07-13 1990-02-14

Also Published As

Publication number Publication date
JPH039414Y2 (en) 1991-03-08

Similar Documents

Publication Publication Date Title
JPS604058U (en) public address telephone equipment
JPH0218617Y2 (en)
JPS5882062U (en) public address telephone
JPS6027439Y2 (en) Voice switch control circuit device
JPS6133537U (en) communication device
JPH0419848U (en)
JPS6045600U (en) variable gain hearing aid
JPS5840957U (en) Radio with channel switching
JPS6129555U (en) cordless telephone
JPS601067U (en) Telephone ring volume adjustment circuit
JPS5994458U (en) personal radio
JPS5816943U (en) Squelch circuit in radio equipment
JPS5933345U (en) transceiver
JPS5857110U (en) Low frequency characteristic improvement circuit
JPS60153018U (en) automatic volume adjustment circuit
JPS61131194U (en)
JPH0221846U (en)
JPS6074356U (en) personal radio
JPH0163250U (en)
JPS6421552U (en)
JPS6288465A (en) Telephone set
JPS59169156U (en) Howler signal sending circuit
JPS61154043U (en)
JPS6082868U (en) Power line carrier telephone terminal equipment
JPS61166649U (en)