BE381693A - - Google Patents

Info

Publication number
BE381693A
BE381693A BE381693DA BE381693A BE 381693 A BE381693 A BE 381693A BE 381693D A BE381693D A BE 381693DA BE 381693 A BE381693 A BE 381693A
Authority
BE
Belgium
Application number
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.)
Publication of BE381693A publication Critical patent/BE381693A/xx

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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; 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)
BE381693D 1931-07-30 BE381693A (zh)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE740836X 1931-07-30

Publications (1)

Publication Number Publication Date
BE381693A true BE381693A (zh)

Family

ID=3879441

Family Applications (3)

Application Number Title Priority Date Filing Date
BE386567D BE386567A (zh) 1931-07-30
BE381693D BE381693A (zh) 1931-07-30
BE384854D BE384854A (zh) 1931-07-30

Family Applications Before (1)

Application Number Title Priority Date Filing Date
BE386567D BE386567A (zh) 1931-07-30

Family Applications After (1)

Application Number Title Priority Date Filing Date
BE384854D BE384854A (zh) 1931-07-30

Country Status (2)

Country Link
BE (3) BE384854A (zh)
FR (1) FR740836A (zh)

Also Published As

Publication number Publication date
BE386567A (zh)
BE384854A (zh)
FR740836A (fr) 1933-02-01

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