BE390588A - - Google Patents

Info

Publication number
BE390588A
BE390588A BE390588DA BE390588A BE 390588 A BE390588 A BE 390588A BE 390588D A BE390588D A BE 390588DA BE 390588 A BE390588 A BE 390588A
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 BE390588A publication Critical patent/BE390588A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Amplitude Modulation (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
BE390588D 1936-04-17 BE390588A (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1107536A GB471270A (en) 1936-04-17 1936-04-17 Improvements in or relating to granular microphones

Publications (1)

Publication Number Publication Date
BE390588A true BE390588A (ja)

Family

ID=9979554

Family Applications (1)

Application Number Title Priority Date Filing Date
BE390588D BE390588A (ja) 1936-04-17

Country Status (3)

Country Link
BE (1) BE390588A (ja)
FR (1) FR742731A (ja)
GB (2) GB383348A (ja)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1061825B (de) * 1954-02-26 1959-07-23 Hans Widmaier Kohlegriessmikrophon-Sprechkapsel

Also Published As

Publication number Publication date
GB383348A (en) 1932-11-17
GB471270A (en) 1937-09-01
FR742731A (ja) 1933-03-14

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