FR539754A - Acoustic receiver - Google Patents

Acoustic receiver

Info

Publication number
FR539754A
FR539754A FR539754DA FR539754A FR 539754 A FR539754 A FR 539754A FR 539754D A FR539754D A FR 539754DA FR 539754 A FR539754 A FR 539754A
Authority
FR
France
Prior art keywords
acoustic receiver
acoustic
receiver
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)
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.)
Signal GmbH
Original Assignee
Signal GmbH
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 Signal GmbH filed Critical Signal GmbH
Application granted granted Critical
Publication of FR539754A publication Critical patent/FR539754A/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)
FR539754D 1917-06-23 1920-12-21 Acoustic receiver Expired FR539754A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE539754X 1917-06-23

Publications (1)

Publication Number Publication Date
FR539754A true FR539754A (en) 1922-06-30

Family

ID=6558680

Family Applications (1)

Application Number Title Priority Date Filing Date
FR539754D Expired FR539754A (en) 1917-06-23 1920-12-21 Acoustic receiver

Country Status (1)

Country Link
FR (1) FR539754A (en)

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