FR867850A - Electro-acoustic systems - Google Patents

Electro-acoustic systems

Info

Publication number
FR867850A
FR867850A FR867850DA FR867850A FR 867850 A FR867850 A FR 867850A FR 867850D A FR867850D A FR 867850DA FR 867850 A FR867850 A FR 867850A
Authority
FR
France
Prior art keywords
electro
acoustic systems
acoustic
systems
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 FR867850A publication Critical patent/FR867850A/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
    • H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR867850D 1941-01-23 1940-11-29 Electro-acoustic systems Expired FR867850A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US867850XA 1941-01-23 1941-01-23

Publications (1)

Publication Number Publication Date
FR867850A true FR867850A (en) 1941-11-29

Family

ID=22200895

Family Applications (1)

Application Number Title Priority Date Filing Date
FR867850D Expired FR867850A (en) 1941-01-23 1940-11-29 Electro-acoustic systems

Country Status (1)

Country Link
FR (1) FR867850A (en)

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