FR719856A - Improvements in sound reproduction - Google Patents

Improvements in sound reproduction

Info

Publication number
FR719856A
FR719856A FR719856DA FR719856A FR 719856 A FR719856 A FR 719856A FR 719856D A FR719856D A FR 719856DA FR 719856 A FR719856 A FR 719856A
Authority
FR
France
Prior art keywords
sound reproduction
reproduction
sound
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
Sidney George Brown
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 FR719856A publication Critical patent/FR719856A/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
    • H04R21/00—Variable-resistance transducers
    • H04R21/04—Gramophone pick-ups using a stylus; Recorders using a stylus

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
FR719856D 1930-12-03 1931-06-26 Improvements in sound reproduction Expired FR719856A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3648030A GB368751A (en) 1930-12-03 1930-12-03 Improvements in or relating to devices for use in the reproduction of sound

Publications (1)

Publication Number Publication Date
FR719856A true FR719856A (en) 1932-02-18

Family

ID=10388539

Family Applications (1)

Application Number Title Priority Date Filing Date
FR719856D Expired FR719856A (en) 1930-12-03 1931-06-26 Improvements in sound reproduction

Country Status (3)

Country Link
BE (1) BE383116A (en)
FR (1) FR719856A (en)
GB (1) GB368751A (en)

Also Published As

Publication number Publication date
BE383116A (en) 1931-11-30
GB368751A (en) 1932-03-03

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