FR567989A - Improvements to vibrating membrane devices - Google Patents

Improvements to vibrating membrane devices

Info

Publication number
FR567989A
FR567989A FR567989DA FR567989A FR 567989 A FR567989 A FR 567989A FR 567989D A FR567989D A FR 567989DA FR 567989 A FR567989 A FR 567989A
Authority
FR
France
Prior art keywords
vibrating membrane
membrane devices
devices
vibrating
membrane
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.)
D INSTR DE PREC ET DYNAMO PHAR
Original Assignee
D INSTR DE PREC ET DYNAMO PHAR
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 D INSTR DE PREC ET DYNAMO PHAR filed Critical D INSTR DE PREC ET DYNAMO PHAR
Application granted granted Critical
Publication of FR567989A publication Critical patent/FR567989A/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
    • H04R11/00—Transducers of moving-armature or moving-core type

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR567989D 1922-09-16 1922-09-16 Improvements to vibrating membrane devices Expired FR567989A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR567989T 1922-09-16

Publications (1)

Publication Number Publication Date
FR567989A true FR567989A (en) 1924-03-12

Family

ID=8948184

Family Applications (1)

Application Number Title Priority Date Filing Date
FR567989D Expired FR567989A (en) 1922-09-16 1922-09-16 Improvements to vibrating membrane devices

Country Status (1)

Country Link
FR (1) FR567989A (en)

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