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BE504911A - - Google Patents
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BE504911A - - Google Patents

Info

Publication number
BE504911A
BE504911A BE504911DA BE504911A BE 504911 A BE504911 A BE 504911A BE 504911D A BE504911D A BE 504911DA BE 504911 A BE504911 A BE 504911A
Authority
BE
Belgium
Prior art keywords
disc
microphone
recess
fixed
insulating material
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE504911A publication Critical patent/BE504911A/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L11/00—Fire-lighters
    • C10L11/04—Fire-lighters consisting of combustible material
    • 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

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Manufacturing & Machinery (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
BE504911D BE504911A (sr)

Publications (1)

Publication Number Publication Date
BE504911A true BE504911A (sr)

Family

ID=145603

Family Applications (1)

Application Number Title Priority Date Filing Date
BE504911D BE504911A (sr)

Country Status (1)

Country Link
BE (1) BE504911A (sr)

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