BE358713A - - Google Patents

Info

Publication number
BE358713A
BE358713A BE358713DA BE358713A BE 358713 A BE358713 A BE 358713A BE 358713D A BE358713D A BE 358713DA BE 358713 A BE358713 A BE 358713A
Authority
BE
Belgium
Prior art keywords
emi
aircraft
fact
devices
receivers
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 BE358713A publication Critical patent/BE358713A/fr

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO 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
    • G01S1/00Beacons 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
    • G01S1/72Beacons 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)
BE358713D 1926-08-25 BE358713A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR633438T 1926-08-25

Publications (1)

Publication Number Publication Date
BE358713A true BE358713A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Family

ID=8992897

Family Applications (1)

Application Number Title Priority Date Filing Date
BE358713D BE358713A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1926-08-25

Country Status (2)

Country Link
BE (1) BE358713A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR633438A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Also Published As

Publication number Publication date
FR633438A (fr) 1928-01-28

Similar Documents

Publication Publication Date Title
US5137110A (en) Highly directional sound projector and receiver apparatus
FR2930346A1 (fr) Anemometre a ultrasons perfectionne.
FR2507849A1 (fr) Appareil acoustique a diagramme de reponse directionnel
FR2726115A1 (fr) Dispositif actif d'attenuation de l'intensite sonore
BE358713A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR2674028A1 (fr) Procede et dispositif de determination du diagramme de rayonnement d'une antenne.
FR2463424A1 (fr) Monture a crosse pour telescopes
US2049586A (en) Single reflector type microphone
EP1523062A1 (fr) Antenne omnidirectionnelle pour la transmission et/ou la réception de signaux audio et/ou vidéo
FR2839813A1 (fr) Dispositif d'antenne multifaisceau.
EP0264320A1 (fr) Sonar cylindrique déployable
FR3060521B1 (fr) Ligne destinee a etre immergee en milieu aquatique
US1619981A (en) Sound magnifier
FR2651082A1 (fr) Emetteur large-bande sous-marin
WO2005103756A1 (fr) Dispositif de detection comprenant un miroir parabolique, et utilisation d'un tel dispositif a bord d'un engin de survol
FR2519502A1 (fr) Mo
BE395356A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
EP3732673A1 (fr) Dispositif de mesure destine a etre immerge
US1649538A (en) Means for receiving and sending directional sound rays
BE362926A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
Lequeux Les méthodes d'étude en radioastronomie
SU7207A1 (ru) Приспособление дл приема и передача звуковых сигналов
US441860A (en) Frank dell a torre
FR2746218A1 (fr) Systeme de reception bi-satellite double convertisseur pour antenne a reflecteur parabolique
Hamon Sur un support de miroirs de télescopes à roulements à billes