FR672743A - Device for tracking aircraft by sound - Google Patents

Device for tracking aircraft by sound

Info

Publication number
FR672743A
FR672743A FR672743DA FR672743A FR 672743 A FR672743 A FR 672743A FR 672743D A FR672743D A FR 672743DA FR 672743 A FR672743 A FR 672743A
Authority
FR
France
Prior art keywords
sound
tracking aircraft
aircraft
tracking
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
Achille Va Hollebecke-Faillant
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 FR672743A publication Critical patent/FR672743A/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
FR672743D 1928-07-24 1928-07-24 Device for tracking aircraft by sound Expired FR672743A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR672743T 1928-07-24

Publications (1)

Publication Number Publication Date
FR672743A true FR672743A (en) 1930-01-06

Family

ID=9017697

Family Applications (1)

Application Number Title Priority Date Filing Date
FR672743D Expired FR672743A (en) 1928-07-24 1928-07-24 Device for tracking aircraft by sound

Country Status (1)

Country Link
FR (1) FR672743A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE744802C (en) * 1938-10-29 1944-01-26 Eberspaecher J Device for locating noises

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE744802C (en) * 1938-10-29 1944-01-26 Eberspaecher J Device for locating noises

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