FR6428E - Thermal device for the reproduction and amplification of sounds - Google Patents

Thermal device for the reproduction and amplification of sounds

Info

Publication number
FR6428E
FR6428E FR6428A FR6428DA FR6428E FR 6428 E FR6428 E FR 6428E FR 6428 A FR6428 A FR 6428A FR 6428D A FR6428D A FR 6428DA FR 6428 E FR6428 E FR 6428E
Authority
FR
France
Prior art keywords
sounds
reproduction
amplification
thermal device
thermal
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
FR6428A
Other languages
French (fr)
Inventor
Georges Laudet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
L GAUMONT ET CIE SOC
Original Assignee
L GAUMONT ET CIE SOC
Publication date
Application granted granted Critical
Publication of FR6428E publication Critical patent/FR6428E/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/42—Combinations of transducers with fluid-pressure or other non-electrical amplifying means

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR6428A Thermal device for the reproduction and amplification of sounds Expired FR6428E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6428T

Publications (1)

Publication Number Publication Date
FR6428E true FR6428E (en) 1906-11-17

Family

ID=8610216

Family Applications (3)

Application Number Title Priority Date Filing Date
FR6428A Expired FR6428E (en) Thermal device for the reproduction and amplification of sounds
FR6492A Expired FR6492E (en) Thermal device for the reproduction and amplification of sounds
FR353259A Expired FR353259A (en) 1905-04-12 Thermal device for the reproduction and amplification of sounds

Family Applications After (2)

Application Number Title Priority Date Filing Date
FR6492A Expired FR6492E (en) Thermal device for the reproduction and amplification of sounds
FR353259A Expired FR353259A (en) 1905-04-12 Thermal device for the reproduction and amplification of sounds

Country Status (1)

Country Link
FR (3) FR353259A (en)

Also Published As

Publication number Publication date
FR6492E (en) 1906-11-26
FR353259A (en) 1905-09-07

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