FR768185A - Détecteur acoustique - Google Patents

Détecteur acoustique

Info

Publication number
FR768185A
FR768185A FR768185DA FR768185A FR 768185 A FR768185 A FR 768185A FR 768185D A FR768185D A FR 768185DA FR 768185 A FR768185 A FR 768185A
Authority
FR
France
Prior art keywords
acoustic detector
acoustic
detector
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.)
Expired
Application number
Other languages
English (en)
Inventor
Marechal Emile
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 filed Critical
Application granted granted Critical
Publication of FR768185A publication Critical patent/FR768185A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K13/00—Cones, diaphragms, or the like, for emitting or receiving sound in general
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
    • G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
    • G08B5/36—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
FR768185D 1934-02-06 1934-02-06 Détecteur acoustique Expired FR768185A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR768185T 1934-02-06

Publications (1)

Publication Number Publication Date
FR768185A true FR768185A (fr) 1934-08-01

Family

ID=9184068

Family Applications (1)

Application Number Title Priority Date Filing Date
FR768185D Expired FR768185A (fr) 1934-02-06 1934-02-06 Détecteur acoustique

Country Status (1)

Country Link
FR (1) FR768185A (fr)

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