FR688130A - Improvements to sound reproduction devices - Google Patents

Improvements to sound reproduction devices

Info

Publication number
FR688130A
FR688130A FR688130DA FR688130A FR 688130 A FR688130 A FR 688130A FR 688130D A FR688130D A FR 688130DA FR 688130 A FR688130 A FR 688130A
Authority
FR
France
Prior art keywords
sound reproduction
reproduction devices
devices
sound
reproduction
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
Rose Mcdonald
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 FR688130A publication Critical patent/FR688130A/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
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
    • H04R7/20—Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR688130D 1929-01-05 1930-01-04 Improvements to sound reproduction devices Expired FR688130A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB688130X 1929-01-05

Publications (1)

Publication Number Publication Date
FR688130A true FR688130A (en) 1930-08-19

Family

ID=10492953

Family Applications (1)

Application Number Title Priority Date Filing Date
FR688130D Expired FR688130A (en) 1929-01-05 1930-01-04 Improvements to sound reproduction devices

Country Status (1)

Country Link
FR (1) FR688130A (en)

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