BE464238A - - Google Patents

Info

Publication number
BE464238A
BE464238A BE464238DA BE464238A BE 464238 A BE464238 A BE 464238A BE 464238D A BE464238D A BE 464238DA BE 464238 A BE464238 A BE 464238A
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 BE464238A publication Critical patent/BE464238A/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/08—Mouthpieces; Microphones; Attachments therefor
    • H04R1/083—Special constructions of mouthpieces
    • 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)
  • Measuring Fluid Pressure (AREA)
BE464238D 1945-04-21 BE464238A (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH245546T 1945-04-21

Publications (1)

Publication Number Publication Date
BE464238A true BE464238A (enrdf_load_stackoverflow)

Family

ID=4464971

Family Applications (1)

Application Number Title Priority Date Filing Date
BE464238D BE464238A (enrdf_load_stackoverflow) 1945-04-21

Country Status (2)

Country Link
BE (1) BE464238A (enrdf_load_stackoverflow)
CH (1) CH245546A (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE506348A (enrdf_load_stackoverflow) * 1950-10-11
DE1112117B (de) * 1957-10-24 1961-08-03 Emma Widmaier Geb Hoffmann Kohlemikrofon

Also Published As

Publication number Publication date
CH245546A (de) 1946-11-15

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