FR680259A - Improvements to sound reproduction systems - Google Patents

Improvements to sound reproduction systems

Info

Publication number
FR680259A
FR680259A FR680259DA FR680259A FR 680259 A FR680259 A FR 680259A FR 680259D A FR680259D A FR 680259DA FR 680259 A FR680259 A FR 680259A
Authority
FR
France
Prior art keywords
sound reproduction
reproduction systems
systems
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
Arthur Frederick Richmo Cotton
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 FR680259A publication Critical patent/FR680259A/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
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR680259D 1928-08-16 1929-08-13 Improvements to sound reproduction systems Expired FR680259A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB680259X 1928-08-16

Publications (1)

Publication Number Publication Date
FR680259A true FR680259A (en) 1930-04-28

Family

ID=10492405

Family Applications (1)

Application Number Title Priority Date Filing Date
FR680259D Expired FR680259A (en) 1928-08-16 1929-08-13 Improvements to sound reproduction systems

Country Status (1)

Country Link
FR (1) FR680259A (en)

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