JPS55128958A - Talking system - Google Patents

Talking system

Info

Publication number
JPS55128958A
JPS55128958A JP3543179A JP3543179A JPS55128958A JP S55128958 A JPS55128958 A JP S55128958A JP 3543179 A JP3543179 A JP 3543179A JP 3543179 A JP3543179 A JP 3543179A JP S55128958 A JPS55128958 A JP S55128958A
Authority
JP
Japan
Prior art keywords
level
reception
handset
speaker
negative feedback
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
Application number
JP3543179A
Other languages
Japanese (ja)
Inventor
Akinori Tomo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP3543179A priority Critical patent/JPS55128958A/en
Publication of JPS55128958A publication Critical patent/JPS55128958A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Transceivers (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)

Abstract

PURPOSE:To always maintain the conversation of the proper level by applying the negative feedback to the transmission level of the transmission part in accordance with the reception level of the telephone reception part. CONSTITUTION:For handset 11, the speaker's voice becomes high or low increasingly due to the peculiar phenomenon and according to the degree of the reception level of level detector 33. Thus the negative feedback is applied to give the control to the output level of mike M via level controller 31 and according to the level of the speaker's voice. The same control is given also to handset 12. As a result, the peculiar phenomenon can be eliminated just by adding an extremely simple hardware, thus ensuring the pleasant conversation at all times and with the proper level.
JP3543179A 1979-03-28 1979-03-28 Talking system Pending JPS55128958A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3543179A JPS55128958A (en) 1979-03-28 1979-03-28 Talking system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3543179A JPS55128958A (en) 1979-03-28 1979-03-28 Talking system

Publications (1)

Publication Number Publication Date
JPS55128958A true JPS55128958A (en) 1980-10-06

Family

ID=12441665

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3543179A Pending JPS55128958A (en) 1979-03-28 1979-03-28 Talking system

Country Status (1)

Country Link
JP (1) JPS55128958A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61192149A (en) * 1985-02-20 1986-08-26 Rohm Co Ltd Automatic transmission and reception level adjusting circuit
JPS6214561A (en) * 1985-07-11 1987-01-23 Toa Tokushu Denki Kk Sound volume controller for loudening telephone set

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61192149A (en) * 1985-02-20 1986-08-26 Rohm Co Ltd Automatic transmission and reception level adjusting circuit
JPH056820B2 (en) * 1985-02-20 1993-01-27 Rohm Kk
JPS6214561A (en) * 1985-07-11 1987-01-23 Toa Tokushu Denki Kk Sound volume controller for loudening telephone set
JPH0528935B2 (en) * 1985-07-11 1993-04-27 Toa Electric Co Ltd

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