FR669801A - Electric wave transmission system - Google Patents

Electric wave transmission system

Info

Publication number
FR669801A
FR669801A FR669801DA FR669801A FR 669801 A FR669801 A FR 669801A FR 669801D A FR669801D A FR 669801DA FR 669801 A FR669801 A FR 669801A
Authority
FR
France
Prior art keywords
transmission system
wave transmission
electric wave
electric
wave
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR669801A publication Critical patent/FR669801A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
FR669801D 1928-05-04 1929-02-18 Electric wave transmission system Expired FR669801A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US275069A US1804127A (en) 1928-05-04 1928-05-04 Speech transmission system

Publications (1)

Publication Number Publication Date
FR669801A true FR669801A (en) 1929-11-21

Family

ID=23050763

Family Applications (1)

Application Number Title Priority Date Filing Date
FR669801D Expired FR669801A (en) 1928-05-04 1929-02-18 Electric wave transmission system

Country Status (2)

Country Link
US (1) US1804127A (en)
FR (1) FR669801A (en)

Also Published As

Publication number Publication date
US1804127A (en) 1931-05-05

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