FR2368769A1 - Dispositif de surveillance sonore - Google Patents

Dispositif de surveillance sonore

Info

Publication number
FR2368769A1
FR2368769A1 FR7631366A FR7631366A FR2368769A1 FR 2368769 A1 FR2368769 A1 FR 2368769A1 FR 7631366 A FR7631366 A FR 7631366A FR 7631366 A FR7631366 A FR 7631366A FR 2368769 A1 FR2368769 A1 FR 2368769A1
Authority
FR
France
Prior art keywords
microphone
signal
surveillance
control signal
protected area
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
FR7631366A
Other languages
English (en)
Other versions
FR2368769B1 (fr
Inventor
Tristan Penet
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.)
Cegelec SA
Original Assignee
Cegelec SA
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 Cegelec SA filed Critical Cegelec SA
Priority to FR7631366A priority Critical patent/FR2368769A1/fr
Publication of FR2368769A1 publication Critical patent/FR2368769A1/fr
Application granted granted Critical
Publication of FR2368769B1 publication Critical patent/FR2368769B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

L'invention concerne un dispositif de surveillance sonore. Le microphone de surveillance reçoit non seulement les sons de la salle à surveiller, mais aussi un signal sonore ou ultrasonore de contrôle codé qui permet de vérifier que le fonctionnement de ce microphone na pas été perturbé accidentellement ou volontairement. Application à la surveillance de locaux à distance.
FR7631366A 1976-10-19 1976-10-19 Dispositif de surveillance sonore Granted FR2368769A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7631366A FR2368769A1 (fr) 1976-10-19 1976-10-19 Dispositif de surveillance sonore

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7631366A FR2368769A1 (fr) 1976-10-19 1976-10-19 Dispositif de surveillance sonore

Publications (2)

Publication Number Publication Date
FR2368769A1 true FR2368769A1 (fr) 1978-05-19
FR2368769B1 FR2368769B1 (fr) 1980-02-08

Family

ID=9178913

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7631366A Granted FR2368769A1 (fr) 1976-10-19 1976-10-19 Dispositif de surveillance sonore

Country Status (1)

Country Link
FR (1) FR2368769A1 (fr)

Also Published As

Publication number Publication date
FR2368769B1 (fr) 1980-02-08

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Legal Events

Date Code Title Description
ST Notification of lapse