JPS54158105A - Speaker device - Google Patents

Speaker device

Info

Publication number
JPS54158105A
JPS54158105A JP6749178A JP6749178A JPS54158105A JP S54158105 A JPS54158105 A JP S54158105A JP 6749178 A JP6749178 A JP 6749178A JP 6749178 A JP6749178 A JP 6749178A JP S54158105 A JPS54158105 A JP S54158105A
Authority
JP
Japan
Prior art keywords
microphone
speaker
control signal
signal
transmitter
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
JP6749178A
Other languages
Japanese (ja)
Other versions
JPS6022877B2 (en
Inventor
Yuzo Fuse
Junkichi Sugita
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 JP6749178A priority Critical patent/JPS6022877B2/en
Publication of JPS54158105A publication Critical patent/JPS54158105A/en
Publication of JPS6022877B2 publication Critical patent/JPS6022877B2/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)
  • Circuit For Audible Band Transducer (AREA)

Abstract

PURPOSE:To prevent the malfunction of the howling prevention function in a simple and assured way by providing the filter circuit into the signal transmission line from the microphone to the speaker in order to eliminate the signal component of the frequency identical to the control signal transmitted from the transmitter. CONSTITUTION:The signals sent from microphone 1 are supplied to speaker 4. The fixed control signal is transmitted from transmitter 2 provided near microphone 1, and receiver 5 receives the control signal when microphone 1 comes near speaker 4 to attenuate the signals to be supplied to speaker 4 from microphone 1. And the signal component of the frequency identical to the control signal is eliminated via LPF11 and in the signal transmission line from microphone 1 to speaker 4. Thus, the mulfunction of the howling prevention function can be prevented in a simple and assured way.
JP6749178A 1978-06-05 1978-06-05 public address system Expired JPS6022877B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6749178A JPS6022877B2 (en) 1978-06-05 1978-06-05 public address system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6749178A JPS6022877B2 (en) 1978-06-05 1978-06-05 public address system

Publications (2)

Publication Number Publication Date
JPS54158105A true JPS54158105A (en) 1979-12-13
JPS6022877B2 JPS6022877B2 (en) 1985-06-04

Family

ID=13346498

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6749178A Expired JPS6022877B2 (en) 1978-06-05 1978-06-05 public address system

Country Status (1)

Country Link
JP (1) JPS6022877B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0226097Y2 (en) * 1987-10-19 1990-07-17

Also Published As

Publication number Publication date
JPS6022877B2 (en) 1985-06-04

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