FR38670E - Advanced microphone - Google Patents

Advanced microphone

Info

Publication number
FR38670E
FR38670E FR38670DA FR38670E FR 38670 E FR38670 E FR 38670E FR 38670D A FR38670D A FR 38670DA FR 38670 E FR38670 E FR 38670E
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
French (fr)
Inventor
Matei Marinesco
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 filed Critical
Application granted granted Critical
Publication of FR38670E publication Critical patent/FR38670E/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
    • 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)
FR38670D 1930-06-24 1930-06-24 Advanced microphone Expired FR38670E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR38670T 1930-06-24

Publications (1)

Publication Number Publication Date
FR38670E true FR38670E (en) 1931-06-26

Family

ID=8675143

Family Applications (1)

Application Number Title Priority Date Filing Date
FR38670D Expired FR38670E (en) 1930-06-24 1930-06-24 Advanced microphone

Country Status (1)

Country Link
FR (1) FR38670E (en)

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