JPS564996A - Handset making use of ear microphone - Google Patents

Handset making use of ear microphone

Info

Publication number
JPS564996A
JPS564996A JP7970279A JP7970279A JPS564996A JP S564996 A JPS564996 A JP S564996A JP 7970279 A JP7970279 A JP 7970279A JP 7970279 A JP7970279 A JP 7970279A JP S564996 A JPS564996 A JP S564996A
Authority
JP
Japan
Prior art keywords
ear microphone
receiver
pickup
hawling
generation
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
JP7970279A
Other languages
Japanese (ja)
Other versions
JPS583439B2 (en
Inventor
Hiroshi Ono
Akira Terajima
Naomi Yoshizawa
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
Pilot Corp
Original Assignee
GEN ENG KK
Pilot Pen 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 GEN ENG KK, Pilot Pen Co Ltd filed Critical GEN ENG KK
Priority to JP7970279A priority Critical patent/JPS583439B2/en
Publication of JPS564996A publication Critical patent/JPS564996A/en
Publication of JPS583439B2 publication Critical patent/JPS583439B2/en
Expired 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

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Abstract

PURPOSE:To prevent the generation of the hawling of a handset that uses a vibra- tion pickup type ear microphone available for a talk with a single ear, by providing a correcting device that cancels the output voltage of a receiver. CONSTITUTION:Correcting device 5 has vibration pickup 6 with nearly the same frequency characteristics that sound vibrating pickup 2 of vibration pickup type ear microphone 1 has. Then, both pickups 2 and 6 are arranged at acoustically-equal intervals to receiver 4 via waveguides 7 and also connected to each other so that both outputs will cancel. Therefore, a voltage developed by ear microphone 1 never reaches transmitter 9, and consequently the generation of hawling can be prevented. As a result, the volume of the receiver can be increased and even under noisy conditions, clear sound reception can be attained.
JP7970279A 1979-06-26 1979-06-26 Transceiver device using ear microphone Expired JPS583439B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7970279A JPS583439B2 (en) 1979-06-26 1979-06-26 Transceiver device using ear microphone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7970279A JPS583439B2 (en) 1979-06-26 1979-06-26 Transceiver device using ear microphone

Publications (2)

Publication Number Publication Date
JPS564996A true JPS564996A (en) 1981-01-19
JPS583439B2 JPS583439B2 (en) 1983-01-21

Family

ID=13697533

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7970279A Expired JPS583439B2 (en) 1979-06-26 1979-06-26 Transceiver device using ear microphone

Country Status (1)

Country Link
JP (1) JPS583439B2 (en)

Also Published As

Publication number Publication date
JPS583439B2 (en) 1983-01-21

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