FR2283490A1 - Systeme de communication sonore - Google Patents

Systeme de communication sonore

Info

Publication number
FR2283490A1
FR2283490A1 FR7429608A FR7429608A FR2283490A1 FR 2283490 A1 FR2283490 A1 FR 2283490A1 FR 7429608 A FR7429608 A FR 7429608A FR 7429608 A FR7429608 A FR 7429608A FR 2283490 A1 FR2283490 A1 FR 2283490A1
Authority
FR
France
Prior art keywords
loudspeaker
inverter switch
oscillators
oscillator
warning system
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
FR7429608A
Other languages
English (en)
French (fr)
Other versions
FR2283490B3 (2
Inventor
Gordon S Carrol
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.)
TDK Micronas GmbH
ITT Inc
Original Assignee
Deutsche ITT Industries GmbH
ITT Industries Inc
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 Deutsche ITT Industries GmbH, ITT Industries Inc filed Critical Deutsche ITT Industries GmbH
Priority to FR7429608A priority Critical patent/FR2283490A1/fr
Publication of FR2283490A1 publication Critical patent/FR2283490A1/fr
Application granted granted Critical
Publication of FR2283490B3 publication Critical patent/FR2283490B3/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems, e.g. audible personal calling systems
    • G08B3/10—Audible signalling systems, e.g. audible personal calling systems using electric transmission; using electromagnetic transmission

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Alarm Systems (AREA)
  • Emergency Alarm Devices (AREA)
FR7429608A 1974-08-30 1974-08-30 Systeme de communication sonore Granted FR2283490A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7429608A FR2283490A1 (fr) 1974-08-30 1974-08-30 Systeme de communication sonore

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7429608A FR2283490A1 (fr) 1974-08-30 1974-08-30 Systeme de communication sonore

Publications (2)

Publication Number Publication Date
FR2283490A1 true FR2283490A1 (fr) 1976-03-26
FR2283490B3 FR2283490B3 (2) 1977-06-17

Family

ID=9142680

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7429608A Granted FR2283490A1 (fr) 1974-08-30 1974-08-30 Systeme de communication sonore

Country Status (1)

Country Link
FR (1) FR2283490A1 (2)

Also Published As

Publication number Publication date
FR2283490B3 (2) 1977-06-17

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