FR944595A - Method for recognizing airplanes by sound and device for applying said method - Google Patents

Method for recognizing airplanes by sound and device for applying said method

Info

Publication number
FR944595A
FR944595A FR944595DA FR944595A FR 944595 A FR944595 A FR 944595A FR 944595D A FR944595D A FR 944595DA FR 944595 A FR944595 A FR 944595A
Authority
FR
France
Prior art keywords
airplanes
recognizing
sound
applying
recognizing airplanes
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
French (fr)
Inventor
Jacques-Charles-Mari Rover Rig
Antoine Menier
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 FR944595A publication Critical patent/FR944595A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/72—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using ultrasonic, sonic or infrasonic waves

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
FR944595D 1936-01-06 1936-01-06 Method for recognizing airplanes by sound and device for applying said method Expired FR944595A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR944595T 1936-01-06

Publications (1)

Publication Number Publication Date
FR944595A true FR944595A (en) 1949-04-08

Family

ID=9471836

Family Applications (1)

Application Number Title Priority Date Filing Date
FR944595D Expired FR944595A (en) 1936-01-06 1936-01-06 Method for recognizing airplanes by sound and device for applying said method

Country Status (1)

Country Link
FR (1) FR944595A (en)

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