JPS5661893A - Public-address transfer method and its public-address device - Google Patents

Public-address transfer method and its public-address device

Info

Publication number
JPS5661893A
JPS5661893A JP13713579A JP13713579A JPS5661893A JP S5661893 A JPS5661893 A JP S5661893A JP 13713579 A JP13713579 A JP 13713579A JP 13713579 A JP13713579 A JP 13713579A JP S5661893 A JPS5661893 A JP S5661893A
Authority
JP
Japan
Prior art keywords
sound
public
address
loudspeaker
emitted
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
JP13713579A
Other languages
Japanese (ja)
Inventor
Junichi Maekawa
Yoichi Ando
Masayuki Morimoto
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP13713579A priority Critical patent/JPS5661893A/en
Publication of JPS5661893A publication Critical patent/JPS5661893A/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

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 enable a real sound to be heard clearly without causing disturbance due to the echo of a reflected sound, by adding a delay sound to the read sound emitted from a loudspeaker. CONSTITUTION:A sound signal sent from sound signal generator 1 is amplified by voltage amplifier 3 and power amplifier 4 and emitted from loudspeaker 2. In this case, delay circuit 5 is interposed between amplifiers 3 and 4 in parallel so as to apply the real sound to mixing circuit 6 with a time lag between 10 and 50msec, so that the read sound and delay sound will be continuously emitted from loudspeaker 2. Thus, the disturbance of a reflected sound is eliminated and the real sound can be heard clearly.
JP13713579A 1979-10-23 1979-10-23 Public-address transfer method and its public-address device Pending JPS5661893A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13713579A JPS5661893A (en) 1979-10-23 1979-10-23 Public-address transfer method and its public-address device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13713579A JPS5661893A (en) 1979-10-23 1979-10-23 Public-address transfer method and its public-address device

Publications (1)

Publication Number Publication Date
JPS5661893A true JPS5661893A (en) 1981-05-27

Family

ID=15191632

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13713579A Pending JPS5661893A (en) 1979-10-23 1979-10-23 Public-address transfer method and its public-address device

Country Status (1)

Country Link
JP (1) JPS5661893A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4618987A (en) * 1983-12-14 1986-10-21 Deutsche Post, Rundfunk-Und Fernsehtechnisches Zentralamt Large-area acoustic radiation system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4618987A (en) * 1983-12-14 1986-10-21 Deutsche Post, Rundfunk-Und Fernsehtechnisches Zentralamt Large-area acoustic radiation system

Similar Documents

Publication Publication Date Title
JPS644200A (en) Sound field improving device
JPS5222853A (en) Amplifier
JPS5661893A (en) Public-address transfer method and its public-address device
JPS5365645A (en) Field effect transistor amplifier circuit
DE2967454D1 (en) Multi-channel amplifying device with an amplifier for groups of oscillations interlaced in time
ES389117A1 (en) Waveform generating circuit
JPS52134481A (en) Piezo-electric conversion device
JPS52152146A (en) Multistage amplifier circuit
JPS51137354A (en) Amplifier parallel operation system
JPS5427341A (en) Nonlinear distortion compensation device
JPS51123546A (en) Power amplifier
JPS5425781A (en) Light receiving apparatus
JPS5224448A (en) Distributed constant type delay line
JPS5234779A (en) Ultrasonic probe
JPS5346001A (en) Audio perpoducer
JPS53105163A (en) Current amplifier circuit
JPS53108420A (en) Speaker driving system
JPS52137238A (en) Gain control circuit
JPS525242A (en) Amplifier circuit
JPS5212810A (en) Magnetic sheet recording reproduction equipment
JPS51151589A (en) A.e. sensor for measuring of large amplitude
JPS5351948A (en) Audio output amplifier
JPS52124324A (en) Speaker system
JPS522123A (en) Video amplifier output circuit
JPS5230362A (en) Phase adjusting circuit