FR45592E - Microphone perfectionné - Google Patents

Microphone perfectionné

Info

Publication number
FR45592E
FR45592E FR45592DA FR45592E FR 45592 E FR45592 E FR 45592E FR 45592D A FR45592D A FR 45592DA FR 45592 E FR45592 E FR 45592E
Authority
FR
France
Prior art keywords
microphone
advanced
advanced 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.)
SIF Societe Independante de Telegraphie Sans Fil
Original Assignee
SIF Societe Independante de Telegraphie Sans Fil
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 SIF Societe Independante de Telegraphie Sans Fil filed Critical SIF Societe Independante de Telegraphie Sans Fil
Application granted granted Critical
Publication of FR45592E publication Critical patent/FR45592E/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
    • H04R21/00—Variable-resistance transducers
    • H04R21/02—Microphones
    • H04R21/021—Microphones with granular resistance material
    • 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
    • H04R1/14—Throat mountings for microphones

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR45592D 1934-06-06 1934-06-06 Microphone perfectionné Expired FR45592E (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR45592T 1934-06-06

Publications (1)

Publication Number Publication Date
FR45592E true FR45592E (fr) 1935-10-17

Family

ID=8681317

Family Applications (2)

Application Number Title Priority Date Filing Date
FR771073D Expired FR771073A (fr) 1934-06-06 1933-06-24 Microphone perfectionné
FR45592D Expired FR45592E (fr) 1934-06-06 1934-06-06 Microphone perfectionné

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR771073D Expired FR771073A (fr) 1934-06-06 1933-06-24 Microphone perfectionné

Country Status (1)

Country Link
FR (2) FR771073A (fr)

Also Published As

Publication number Publication date
FR771073A (fr) 1934-09-29

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