FR214E - An advanced system with "telephone apparatus allowing to reinforce the sound of the voice - Google Patents

An advanced system with "telephone apparatus allowing to reinforce the sound of the voice

Info

Publication number
FR214E
FR214E FR214A FR214DA FR214E FR 214 E FR214 E FR 214E FR 214 A FR214 A FR 214A FR 214D A FR214D A FR 214DA FR 214 E FR214 E FR 214E
Authority
FR
France
Prior art keywords
reinforce
voice
sound
telephone apparatus
advanced system
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
FR214A
Other languages
French (fr)
Inventor
Schlesinger
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.)
VEUVE CHARRON ET BELLANGER SOC
Original Assignee
VEUVE CHARRON ET BELLANGER SOC
Publication date
Application granted granted Critical
Publication of FR214E publication Critical patent/FR214E/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R13/00Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR214A An advanced system with "telephone apparatus allowing to reinforce the sound of the voice Expired FR214E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR315316T

Publications (1)

Publication Number Publication Date
FR214E true FR214E (en) 1902-11-21

Family

ID=8889595

Family Applications (2)

Application Number Title Priority Date Filing Date
FR315316D Active FR315316A (en)
FR214A Expired FR214E (en) An advanced system with "telephone apparatus allowing to reinforce the sound of the voice

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR315316D Active FR315316A (en)

Country Status (1)

Country Link
FR (2) FR214E (en)

Also Published As

Publication number Publication date
FR315316A (en)

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