BE387218A - - Google Patents

Info

Publication number
BE387218A
BE387218A BE387218DA BE387218A BE 387218 A BE387218 A BE 387218A BE 387218D A BE387218D A BE 387218DA BE 387218 A BE387218 A BE 387218A
Authority
BE
Belgium
Prior art keywords
field
emi
cells
sound
listening
Prior art date
Application number
Other languages
English (en)
French (fr)
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.)
Publication of BE387218A publication Critical patent/BE387218A/fr

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)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
BE387218D 1931-05-11 BE387218A (cs)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR733182T 1931-05-11

Publications (1)

Publication Number Publication Date
BE387218A true BE387218A (cs)

Family

ID=9124587

Family Applications (1)

Application Number Title Priority Date Filing Date
BE387218D BE387218A (cs) 1931-05-11

Country Status (2)

Country Link
BE (1) BE387218A (cs)
FR (1) FR733182A (cs)

Also Published As

Publication number Publication date
FR733182A (fr) 1932-10-01

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