JPH0480580B2 - - Google Patents

Info

Publication number
JPH0480580B2
JPH0480580B2 JP58233491A JP23349183A JPH0480580B2 JP H0480580 B2 JPH0480580 B2 JP H0480580B2 JP 58233491 A JP58233491 A JP 58233491A JP 23349183 A JP23349183 A JP 23349183A JP H0480580 B2 JPH0480580 B2 JP H0480580B2
Authority
JP
Japan
Prior art keywords
circuit
loss
transmitting
receiving
level
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.)
Expired - Lifetime
Application number
JP58233491A
Other languages
English (en)
Japanese (ja)
Other versions
JPS60126950A (ja
Inventor
Masayuki Tsurusaki
Taiji Sato
Takeshi Horiuchi
Shinichi Shibata
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.)
Toshiba Corp
Original Assignee
Tokyo Shibaura 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 Tokyo Shibaura Electric Co Ltd filed Critical Tokyo Shibaura Electric Co Ltd
Priority to JP23349183A priority Critical patent/JPS60126950A/ja
Publication of JPS60126950A publication Critical patent/JPS60126950A/ja
Publication of JPH0480580B2 publication Critical patent/JPH0480580B2/ja
Granted 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)
JP23349183A 1983-12-13 1983-12-13 拡声電話装置 Granted JPS60126950A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23349183A JPS60126950A (ja) 1983-12-13 1983-12-13 拡声電話装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23349183A JPS60126950A (ja) 1983-12-13 1983-12-13 拡声電話装置

Publications (2)

Publication Number Publication Date
JPS60126950A JPS60126950A (ja) 1985-07-06
JPH0480580B2 true JPH0480580B2 (en]) 1992-12-18

Family

ID=16955840

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23349183A Granted JPS60126950A (ja) 1983-12-13 1983-12-13 拡声電話装置

Country Status (1)

Country Link
JP (1) JPS60126950A (en])

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6339249A (ja) * 1986-08-05 1988-02-19 Nec Corp 周囲騒音感応型電話機
JP2839509B2 (ja) * 1988-08-30 1998-12-16 株式会社東芝 電話装置
JP2746963B2 (ja) * 1988-12-19 1998-05-06 株式会社東芝 拡声電話装置
US5007046A (en) * 1988-12-28 1991-04-09 At&T Bell Laboratories Computer controlled adaptive speakerphone
US4959857A (en) * 1988-12-28 1990-09-25 At&T Bell Laboratories Acoustic calibration arrangement for a voice switched speakerphone
DE19535788C2 (de) * 1995-09-26 2003-04-17 Hermetik Hydraulik Ab Taeby Verfahren zum Kaltentzundern
JP4131252B2 (ja) * 2004-05-31 2008-08-13 松下電工株式会社 拡声通話装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5977710A (ja) * 1982-10-02 1984-05-04 Fujitsu Ltd マイクロホン増巾回路

Also Published As

Publication number Publication date
JPS60126950A (ja) 1985-07-06

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