FR682933A - Magnétophone ou récepteur de son - Google Patents

Magnétophone ou récepteur de son

Info

Publication number
FR682933A
FR682933A FR682933DA FR682933A FR 682933 A FR682933 A FR 682933A FR 682933D A FR682933D A FR 682933DA FR 682933 A FR682933 A FR 682933A
Authority
FR
France
Prior art keywords
tape recorder
sound receiver
sound
receiver
recorder
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
English (en)
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.)
Submarine Signal Co
Original Assignee
Submarine Signal Co
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 Submarine Signal Co filed Critical Submarine Signal Co
Application granted granted Critical
Publication of FR682933A publication Critical patent/FR682933A/fr
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)
  • Diaphragms For Electromechanical Transducers (AREA)
FR682933D 1928-11-19 1929-10-08 Magnétophone ou récepteur de son Expired FR682933A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US320368A US2003284A (en) 1928-11-19 1928-11-19 Acoustic apparatus

Publications (1)

Publication Number Publication Date
FR682933A true FR682933A (fr) 1930-06-04

Family

ID=23246102

Family Applications (1)

Application Number Title Priority Date Filing Date
FR682933D Expired FR682933A (fr) 1928-11-19 1929-10-08 Magnétophone ou récepteur de son

Country Status (2)

Country Link
US (1) US2003284A (fr)
FR (1) FR682933A (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2838127A (en) * 1953-11-04 1958-06-10 Philips Corp Device for the transmission of sound from rooms having a high noise level

Also Published As

Publication number Publication date
US2003284A (en) 1935-06-04

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