FR1979E - Système de microphone - Google Patents

Système de microphone

Info

Publication number
FR1979E
FR1979E FR1979DA FR1979E FR 1979 E FR1979 E FR 1979E FR 1979D A FR1979D A FR 1979DA FR 1979 E FR1979 E FR 1979E
Authority
FR
France
Prior art keywords
microphone system
microphone
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
English (en)
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.)
E RUOFF ET CIE SOC
Original Assignee
E RUOFF ET CIE SOC
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 by E RUOFF ET CIE SOC filed Critical E RUOFF ET CIE SOC
Application granted granted Critical
Publication of FR1979E publication Critical patent/FR1979E/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/12—Sanitary or hygienic devices for mouthpieces or earpieces, e.g. for protecting against infection

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR1979D 1903-04-01 1903-06-17 Système de microphone Expired FR1979E (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR330829T 1903-04-01
FR1979T 1903-06-17

Publications (1)

Publication Number Publication Date
FR1979E true FR1979E (fr) 1903-11-24

Family

ID=1344423

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1979D Expired FR1979E (fr) 1903-04-01 1903-06-17 Système de microphone

Country Status (1)

Country Link
FR (1) FR1979E (fr)

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