JPS52142909A - Hand free telephone - Google Patents

Hand free telephone

Info

Publication number
JPS52142909A
JPS52142909A JP5989976A JP5989976A JPS52142909A JP S52142909 A JPS52142909 A JP S52142909A JP 5989976 A JP5989976 A JP 5989976A JP 5989976 A JP5989976 A JP 5989976A JP S52142909 A JPS52142909 A JP S52142909A
Authority
JP
Japan
Prior art keywords
free telephone
hand free
make
telephone
voice
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
JP5989976A
Other languages
Japanese (ja)
Inventor
Minoru Hisatami
Masao Makino
Yoshizo Oki
Tadaji Sueishi
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.)
HASEGAWA DENKI SEISAKUSHO KK
Nippon Telegraph and Telephone Corp
Original Assignee
HASEGAWA DENKI SEISAKUSHO KK
Nippon Telegraph and Telephone Corp
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 HASEGAWA DENKI SEISAKUSHO KK, Nippon Telegraph and Telephone Corp filed Critical HASEGAWA DENKI SEISAKUSHO KK
Priority to JP5989976A priority Critical patent/JPS52142909A/en
Publication of JPS52142909A publication Critical patent/JPS52142909A/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)

Abstract

PURPOSE:To make it possible to prevent the howling and also to make the simultaneous telephone call, by receiving the voice received from the telephone by the speaker, and transmitting the voice to be transmitted by the ear attachable microphone, etc..
JP5989976A 1976-05-24 1976-05-24 Hand free telephone Pending JPS52142909A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5989976A JPS52142909A (en) 1976-05-24 1976-05-24 Hand free telephone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5989976A JPS52142909A (en) 1976-05-24 1976-05-24 Hand free telephone

Publications (1)

Publication Number Publication Date
JPS52142909A true JPS52142909A (en) 1977-11-29

Family

ID=13126418

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5989976A Pending JPS52142909A (en) 1976-05-24 1976-05-24 Hand free telephone

Country Status (1)

Country Link
JP (1) JPS52142909A (en)

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