FR564369A - Device for the reproduction and amplification of acoustic waves - Google Patents

Device for the reproduction and amplification of acoustic waves

Info

Publication number
FR564369A
FR564369A FR564369DA FR564369A FR 564369 A FR564369 A FR 564369A FR 564369D A FR564369D A FR 564369DA FR 564369 A FR564369 A FR 564369A
Authority
FR
France
Prior art keywords
reproduction
amplification
acoustic waves
acoustic
waves
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
David Carl Alfred Hultstrom
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 FR564369A publication Critical patent/FR564369A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR564369D 1922-03-28 1923-03-27 Device for the reproduction and amplification of acoustic waves Expired FR564369A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE564369X 1922-03-28

Publications (1)

Publication Number Publication Date
FR564369A true FR564369A (en) 1923-12-28

Family

ID=6566968

Family Applications (1)

Application Number Title Priority Date Filing Date
FR564369D Expired FR564369A (en) 1922-03-28 1923-03-27 Device for the reproduction and amplification of acoustic waves

Country Status (1)

Country Link
FR (1) FR564369A (en)

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