JPS5675764A - Conference telephone set - Google Patents

Conference telephone set

Info

Publication number
JPS5675764A
JPS5675764A JP15156279A JP15156279A JPS5675764A JP S5675764 A JPS5675764 A JP S5675764A JP 15156279 A JP15156279 A JP 15156279A JP 15156279 A JP15156279 A JP 15156279A JP S5675764 A JPS5675764 A JP S5675764A
Authority
JP
Japan
Prior art keywords
ceiling
directional transmission
room
attendees
floor
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
JP15156279A
Other languages
Japanese (ja)
Inventor
Kiyoyasu Miyawaki
Tetsuo Ishizaka
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP15156279A priority Critical patent/JPS5675764A/en
Publication of JPS5675764A publication Critical patent/JPS5675764A/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)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)

Abstract

PURPOSE:To enable very natural conference under excellent communication quality, by vertically locating a directional transmission unit on the floor and locating speakers as reception sound source on the ceiling just above them. CONSTITUTION:On the straight line of a straight line fitting base 2 standing vertically from a installing stand 1, nondirectional microphone units 4-1-4-n are located with equal distance to form the directional transmission units, which are vertically located on the floor. Further, one speaker 6 as the reception sound source is located on the ceiling just above the directional transmission unit or a plurality of them are located on the ceiling on a circle taking the ceiling just above as a center with equal interval.With the microphones and speakers thus located, the attendees in the room can mutually communicate with the attendees of another conference room apart from the room.
JP15156279A 1979-11-22 1979-11-22 Conference telephone set Pending JPS5675764A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15156279A JPS5675764A (en) 1979-11-22 1979-11-22 Conference telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15156279A JPS5675764A (en) 1979-11-22 1979-11-22 Conference telephone set

Publications (1)

Publication Number Publication Date
JPS5675764A true JPS5675764A (en) 1981-06-23

Family

ID=15521236

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15156279A Pending JPS5675764A (en) 1979-11-22 1979-11-22 Conference telephone set

Country Status (1)

Country Link
JP (1) JPS5675764A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4605823A (en) * 1982-11-12 1986-08-12 Fujitsu Limited Phone conference system
WO1996032804A1 (en) * 1995-04-07 1996-10-17 Konftel Ab Device and method for voice conference communication

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4605823A (en) * 1982-11-12 1986-08-12 Fujitsu Limited Phone conference system
WO1996032804A1 (en) * 1995-04-07 1996-10-17 Konftel Ab Device and method for voice conference communication

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