FR1055547A - Recording and reproduction of modulated ultrasound sounds - Google Patents

Recording and reproduction of modulated ultrasound sounds

Info

Publication number
FR1055547A
FR1055547A FR1055547DA FR1055547A FR 1055547 A FR1055547 A FR 1055547A FR 1055547D A FR1055547D A FR 1055547DA FR 1055547 A FR1055547 A FR 1055547A
Authority
FR
France
Prior art keywords
reproduction
recording
modulated ultrasound
sounds
ultrasound sounds
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
Roger Boy De La Tour
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
Priority claimed from FR1055547T external-priority
Application filed filed Critical
Application granted granted Critical
Publication of FR1055547A publication Critical patent/FR1055547A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/34—Travelling-wave tubes; Tubes in which a travelling wave is simulated at spaced gaps
    • H01J25/48—Tubes in which two electron streams of different velocities interact with one another, e.g. electron-wave tube
FR1055547D 1952-04-21 1952-04-21 Recording and reproduction of modulated ultrasound sounds Expired FR1055547A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1055547T 1952-04-21

Publications (1)

Publication Number Publication Date
FR1055547A true FR1055547A (en) 1954-02-19

Family

ID=9597036

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1055547D Expired FR1055547A (en) 1952-04-21 1952-04-21 Recording and reproduction of modulated ultrasound sounds

Country Status (1)

Country Link
FR (1) FR1055547A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0062336A1 (en) * 1981-04-08 1982-10-13 TELDEC Schallplatten GmbH Arrangement and method for cutting information into a metallic groove carrier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0062336A1 (en) * 1981-04-08 1982-10-13 TELDEC Schallplatten GmbH Arrangement and method for cutting information into a metallic groove carrier

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