JPS5525258A - Acoustic apparatus - Google Patents

Acoustic apparatus

Info

Publication number
JPS5525258A
JPS5525258A JP9807778A JP9807778A JPS5525258A JP S5525258 A JPS5525258 A JP S5525258A JP 9807778 A JP9807778 A JP 9807778A JP 9807778 A JP9807778 A JP 9807778A JP S5525258 A JPS5525258 A JP S5525258A
Authority
JP
Japan
Prior art keywords
mike
transmitter
speaker
magnetic flux
inductive magnetic
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
JP9807778A
Other languages
Japanese (ja)
Other versions
JPS6125280B2 (en
Inventor
Yuzo Fuse
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP9807778A priority Critical patent/JPS5525258A/en
Publication of JPS5525258A publication Critical patent/JPS5525258A/en
Publication of JPS6125280B2 publication Critical patent/JPS6125280B2/ja
Granted 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)
  • Circuit For Audible Band Transducer (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

PURPOSE:To attenuate the signals supplied to the speaker from the mike and thus to prevent the howling by detecting the inductive magnetic flux sent from the transmitter provided near the mike through the tuning circuit and then turning on FET. CONSTITUTION:Inductive transmitter 62 is provided near mike 61 connected to external mike jack 11, and the inductive magnetic flux of the frequency slightly out of the broadcast band of the AM radio is emitted from transmitter 62. In case change-over switches 81...85 are switched to the side of contact A, the inductive magnetic flux is detected through the tuning circuit consisting of bar antenna 32 and capacitor 73 from transmitter 62 when mike 61 gets close to speaker 19. And the signal is detected 37 to turn on FET24 via smoothing circuit 91. Thus the signals supplied to speaker 19 from mike 61 are attenuated to prevent the howling.
JP9807778A 1978-08-11 1978-08-11 Acoustic apparatus Granted JPS5525258A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9807778A JPS5525258A (en) 1978-08-11 1978-08-11 Acoustic apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9807778A JPS5525258A (en) 1978-08-11 1978-08-11 Acoustic apparatus

Publications (2)

Publication Number Publication Date
JPS5525258A true JPS5525258A (en) 1980-02-22
JPS6125280B2 JPS6125280B2 (en) 1986-06-14

Family

ID=14210275

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9807778A Granted JPS5525258A (en) 1978-08-11 1978-08-11 Acoustic apparatus

Country Status (1)

Country Link
JP (1) JPS5525258A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58135284A (en) * 1982-02-03 1983-08-11 株式会社熊平製作所 Throwing-in apparatus of night throwing- in strong box
GB2591731A (en) * 2019-12-11 2021-08-11 Gibby Adrian Elimination of microphone feedback using cardioid antennas

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4925496A (en) * 1972-07-01 1974-03-06

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4925496A (en) * 1972-07-01 1974-03-06

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58135284A (en) * 1982-02-03 1983-08-11 株式会社熊平製作所 Throwing-in apparatus of night throwing- in strong box
GB2591731A (en) * 2019-12-11 2021-08-11 Gibby Adrian Elimination of microphone feedback using cardioid antennas

Also Published As

Publication number Publication date
JPS6125280B2 (en) 1986-06-14

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