JPS58115911A - 送話装置 - Google Patents

送話装置

Info

Publication number
JPS58115911A
JPS58115911A JP21241981A JP21241981A JPS58115911A JP S58115911 A JPS58115911 A JP S58115911A JP 21241981 A JP21241981 A JP 21241981A JP 21241981 A JP21241981 A JP 21241981A JP S58115911 A JPS58115911 A JP S58115911A
Authority
JP
Japan
Prior art keywords
output
input
transmitter
sound pressure
amplifier
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.)
Granted
Application number
JP21241981A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6247003B2 (enExample
Inventor
Hideyo Ono
小野　英世
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP21241981A priority Critical patent/JPS58115911A/ja
Priority to US06/453,545 priority patent/US4506381A/en
Publication of JPS58115911A publication Critical patent/JPS58115911A/ja
Publication of JPS6247003B2 publication Critical patent/JPS6247003B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/32—Automatic control in amplifiers having semiconductor devices the control being dependent upon ambient noise level or sound level
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6008—Substation equipment, e.g. for use by subscribers including speech amplifiers in the transmitter circuit
    • 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)
  • Control Of Amplification And Gain Control (AREA)
  • Telephone Set Structure (AREA)
  • Transmitters (AREA)
JP21241981A 1981-12-29 1981-12-29 送話装置 Granted JPS58115911A (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP21241981A JPS58115911A (ja) 1981-12-29 1981-12-29 送話装置
US06/453,545 US4506381A (en) 1981-12-29 1982-12-27 Aural transmitter device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21241981A JPS58115911A (ja) 1981-12-29 1981-12-29 送話装置

Publications (2)

Publication Number Publication Date
JPS58115911A true JPS58115911A (ja) 1983-07-09
JPS6247003B2 JPS6247003B2 (enExample) 1987-10-06

Family

ID=16622270

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21241981A Granted JPS58115911A (ja) 1981-12-29 1981-12-29 送話装置

Country Status (1)

Country Link
JP (1) JPS58115911A (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6199451A (ja) * 1984-09-21 1986-05-17 Toshiba Corp 電話機

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6199451A (ja) * 1984-09-21 1986-05-17 Toshiba Corp 電話機

Also Published As

Publication number Publication date
JPS6247003B2 (enExample) 1987-10-06

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