FR368064A - Perfectionnement aux microphones - Google Patents

Perfectionnement aux microphones

Info

Publication number
FR368064A
FR368064A FR368064DA FR368064A FR 368064 A FR368064 A FR 368064A FR 368064D A FR368064D A FR 368064DA FR 368064 A FR368064 A FR 368064A
Authority
FR
France
Prior art keywords
microphone
development
microphone development
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.)
NAUTISKA INSTR AB
Original Assignee
NAUTISKA INSTR AB
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 NAUTISKA INSTR AB filed Critical NAUTISKA INSTR AB
Application granted granted Critical
Publication of FR368064A publication Critical patent/FR368064A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR368064D 1906-07-13 1906-07-13 Perfectionnement aux microphones Expired FR368064A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR368064T 1906-07-13

Publications (1)

Publication Number Publication Date
FR368064A true FR368064A (fr) 1906-11-16

Family

ID=1415153

Family Applications (1)

Application Number Title Priority Date Filing Date
FR368064D Expired FR368064A (fr) 1906-07-13 1906-07-13 Perfectionnement aux microphones

Country Status (1)

Country Link
FR (1) FR368064A (fr)

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