JPS544003A - Mutual communication unit of loud type - Google Patents

Mutual communication unit of loud type

Info

Publication number
JPS544003A
JPS544003A JP6931377A JP6931377A JPS544003A JP S544003 A JPS544003 A JP S544003A JP 6931377 A JP6931377 A JP 6931377A JP 6931377 A JP6931377 A JP 6931377A JP S544003 A JPS544003 A JP S544003A
Authority
JP
Japan
Prior art keywords
communication unit
mutual communication
loud
type
loud type
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
JP6931377A
Other languages
Japanese (ja)
Inventor
Seiji Nakama
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP6931377A priority Critical patent/JPS544003A/en
Publication of JPS544003A publication Critical patent/JPS544003A/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
    • H04M9/10—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic with switching of direction of transmission by voice frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

PURPOSE:To make easy the interruption from the receiver, by attenuating the gain of the transmitter amplifiing circuit, through obtaining rectifying output only from normal noise and through discriminating the normal noise from the audio with a rectifying circuit connected to the transmitter amplifying circuit.
JP6931377A 1977-06-10 1977-06-10 Mutual communication unit of loud type Pending JPS544003A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6931377A JPS544003A (en) 1977-06-10 1977-06-10 Mutual communication unit of loud type

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6931377A JPS544003A (en) 1977-06-10 1977-06-10 Mutual communication unit of loud type

Publications (1)

Publication Number Publication Date
JPS544003A true JPS544003A (en) 1979-01-12

Family

ID=13398936

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6931377A Pending JPS544003A (en) 1977-06-10 1977-06-10 Mutual communication unit of loud type

Country Status (1)

Country Link
JP (1) JPS544003A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50124508A (en) * 1973-03-12 1975-09-30
JPS5154703A (en) * 1974-11-08 1976-05-14 Oki Electric Ind Co Ltd

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50124508A (en) * 1973-03-12 1975-09-30
JPS5154703A (en) * 1974-11-08 1976-05-14 Oki Electric Ind Co Ltd

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