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JPS56152396A - Voice start control system by ear microphone - Google Patents

Voice start control system by ear microphone

Info

Publication number
JPS56152396A
JPS56152396A JP5356480A JP5356480A JPS56152396A JP S56152396 A JPS56152396 A JP S56152396A JP 5356480 A JP5356480 A JP 5356480A JP 5356480 A JP5356480 A JP 5356480A JP S56152396 A JPS56152396 A JP S56152396A
Authority
JP
Japan
Prior art keywords
circuit
input
output
relay
ear microphone
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
JP5356480A
Other languages
Japanese (ja)
Inventor
Hiroshi Ono
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.)
GEN ENG KK
GEN ENGINEERING KK
Original Assignee
GEN ENG KK
GEN ENGINEERING KK
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 GEN ENG KK, GEN ENGINEERING KK filed Critical GEN ENG KK
Priority to JP5356480A priority Critical patent/JPS56152396A/en
Priority to DE19813115934 priority patent/DE3115934A1/en
Priority to FR8108115A priority patent/FR2481546A1/en
Priority to GB8112702A priority patent/GB2074818B/en
Publication of JPS56152396A publication Critical patent/JPS56152396A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/02—Circuits for transducers, loudspeakers or microphones for preventing acoustic reaction, i.e. acoustic oscillatory feedback
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/44—Transmit/receive switching
    • H04B1/46—Transmit/receive switching by voice-frequency signals; by pilot signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Transceivers (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Abstract

PURPOSE: To prevent a malfunction due to noise caused at the switching operation from transmission to receiving, by short circuiting the input of the amplifier of an ear microphone for a constant time just before switching operation from transmission to receiving.
CONSTITUTION: The output of ear microphone 1 is input to radio equipment 3 through amplifiers 2A and 2B. The output of mike 1 is input to amplifier 2C, BPF4, amplifier 2D, integrating circuit 9, delay circuit 10, and keeping circuit 11 also, and the output is input to PPT relay driving circuit 11 to drive PPT relay 6. Driving of relay 6 is detected just before driving by PPT detector 12, and the output is input to INST relay driving circuit 7 through keeping circuit 13. INST relay 8 is driven by the output of circuit 7, and inputs to amplifiers 2B and 2C of mike 1 are shorted for a constant time from the time just before switching operation from transmission to receiving.
COPYRIGHT: (C)1981,JPO&Japio
JP5356480A 1980-04-24 1980-04-24 Voice start control system by ear microphone Pending JPS56152396A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP5356480A JPS56152396A (en) 1980-04-24 1980-04-24 Voice start control system by ear microphone
DE19813115934 DE3115934A1 (en) 1980-04-24 1981-04-22 Intercom device with automatic changeover from transmission to reception
FR8108115A FR2481546A1 (en) 1980-04-24 1981-04-23 CONTROL SYSTEM FOR INTERCHANGING TRANSMISSION AND RECEPTION STATES IN A TWO-CHANNEL COMMUNICATION DEVICE
GB8112702A GB2074818B (en) 1980-04-24 1981-04-24 Control systems for automobile changeover between transmission and reception of communication devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5356480A JPS56152396A (en) 1980-04-24 1980-04-24 Voice start control system by ear microphone

Publications (1)

Publication Number Publication Date
JPS56152396A true JPS56152396A (en) 1981-11-25

Family

ID=12946309

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5356480A Pending JPS56152396A (en) 1980-04-24 1980-04-24 Voice start control system by ear microphone

Country Status (4)

Country Link
JP (1) JPS56152396A (en)
DE (1) DE3115934A1 (en)
FR (1) FR2481546A1 (en)
GB (1) GB2074818B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02132998A (en) * 1988-11-14 1990-05-22 Toshiba Corp Microphone
JPH0477131A (en) * 1990-07-17 1992-03-11 Kemikaraijingu Kenkyusho:Kk Optical transmitter-receiver
JPH0564281A (en) * 1991-08-28 1993-03-12 Souei Denki Seisakusho:Yugen Method for inputting voice from throat through timpanum and method for using it
JPH08172396A (en) * 1994-12-15 1996-07-02 Temuko Japan:Kk Cordless speaking system using infrared ray
JP2000196529A (en) * 1998-12-25 2000-07-14 Honda Motor Co Ltd On-vehicle communication unit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59108358U (en) * 1982-07-27 1984-07-21 宮田　慎太郎 Automatic voice transmission/reception switching device for ear canal shaped handset

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB341480A (en) * 1929-10-16 1931-01-16 Western Electric Co Improvements in or relating to wave signalling systems
GB1508750A (en) * 1975-05-28 1978-04-26 Tani Denki Kogyo Kk Transmit-receive circuit changing switch system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02132998A (en) * 1988-11-14 1990-05-22 Toshiba Corp Microphone
JPH0477131A (en) * 1990-07-17 1992-03-11 Kemikaraijingu Kenkyusho:Kk Optical transmitter-receiver
JPH0564281A (en) * 1991-08-28 1993-03-12 Souei Denki Seisakusho:Yugen Method for inputting voice from throat through timpanum and method for using it
JPH08172396A (en) * 1994-12-15 1996-07-02 Temuko Japan:Kk Cordless speaking system using infrared ray
JP2000196529A (en) * 1998-12-25 2000-07-14 Honda Motor Co Ltd On-vehicle communication unit

Also Published As

Publication number Publication date
GB2074818B (en) 1984-08-22
DE3115934A1 (en) 1982-01-28
GB2074818A (en) 1981-11-04
FR2481546A1 (en) 1981-10-30

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