FR664037A - Installation for acoustic signaling by high frequency oscillations - Google Patents

Installation for acoustic signaling by high frequency oscillations

Info

Publication number
FR664037A
FR664037A FR664037DA FR664037A FR 664037 A FR664037 A FR 664037A FR 664037D A FR664037D A FR 664037DA FR 664037 A FR664037 A FR 664037A
Authority
FR
France
Prior art keywords
installation
high frequency
frequency oscillations
acoustic signaling
signaling
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.)
ELAC Electroacustic GmbH
Original Assignee
ELAC Electroacustic 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 ELAC Electroacustic GmbH filed Critical ELAC Electroacustic GmbH
Application granted granted Critical
Publication of FR664037A publication Critical patent/FR664037A/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)
FR664037D 1927-11-23 1928-11-16 Installation for acoustic signaling by high frequency oscillations Expired FR664037A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE664037X 1927-11-23

Publications (1)

Publication Number Publication Date
FR664037A true FR664037A (en) 1929-08-28

Family

ID=6589357

Family Applications (1)

Application Number Title Priority Date Filing Date
FR664037D Expired FR664037A (en) 1927-11-23 1928-11-16 Installation for acoustic signaling by high frequency oscillations

Country Status (1)

Country Link
FR (1) FR664037A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2447333A (en) * 1931-12-30 1948-08-17 Us Navy Ultra-audible sound reception

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2447333A (en) * 1931-12-30 1948-08-17 Us Navy Ultra-audible sound reception

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