FR638030A - New membrane applicable to microphones and telephones and devices deriving from the use of this membrane - Google Patents

New membrane applicable to microphones and telephones and devices deriving from the use of this membrane

Info

Publication number
FR638030A
FR638030A FR638030DA FR638030A FR 638030 A FR638030 A FR 638030A FR 638030D A FR638030D A FR 638030DA FR 638030 A FR638030 A FR 638030A
Authority
FR
France
Prior art keywords
membrane
microphones
telephones
applicable
new
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
Charles Lavanchy
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 filed Critical
Application granted granted Critical
Publication of FR638030A publication Critical patent/FR638030A/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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/24—Tensioning by means acting directly on free portions of diaphragm or cone

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR638030D 1927-07-20 1927-07-20 New membrane applicable to microphones and telephones and devices deriving from the use of this membrane Expired FR638030A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR638030T 1927-07-20

Publications (1)

Publication Number Publication Date
FR638030A true FR638030A (en) 1928-05-14

Family

ID=8995746

Family Applications (1)

Application Number Title Priority Date Filing Date
FR638030D Expired FR638030A (en) 1927-07-20 1927-07-20 New membrane applicable to microphones and telephones and devices deriving from the use of this membrane

Country Status (1)

Country Link
FR (1) FR638030A (en)

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