CH287033A - Kohlekörnermikrophon. - Google Patents

Kohlekörnermikrophon.

Info

Publication number
CH287033A
CH287033A CH287033DA CH287033A CH 287033 A CH287033 A CH 287033A CH 287033D A CH287033D A CH 287033DA CH 287033 A CH287033 A CH 287033A
Authority
CH
Switzerland
Prior art keywords
coal grain
microphone
grain microphone
coal
grain
Prior art date
Application number
Other languages
English (en)
Inventor
Daniel Vigren Sten
Ernfried Gustafsson Gustaf
Original Assignee
Daniel Vigren Sten
Ernfried Gustafsson Gustaf
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 by Daniel Vigren Sten, Ernfried Gustafsson Gustaf filed Critical Daniel Vigren Sten
Publication of CH287033A publication Critical patent/CH287033A/de

Links

Classifications

    • 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
    • H04R21/026—Microphones in which the sound is perpendicular to the current crossing the transducer material

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
CH287033D 1950-11-19 1950-06-16 Kohlekörnermikrophon. CH287033A (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEV2863A DE844307C (de) 1950-11-19 1950-11-19 Kohlekoerner-Mikrophon

Publications (1)

Publication Number Publication Date
CH287033A true CH287033A (de) 1952-11-15

Family

ID=7570197

Family Applications (1)

Application Number Title Priority Date Filing Date
CH287033D CH287033A (de) 1950-11-19 1950-06-16 Kohlekörnermikrophon.

Country Status (3)

Country Link
CH (1) CH287033A (de)
DE (1) DE844307C (de)
FR (1) FR1019736A (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1003264B (de) * 1954-07-08 1957-02-28 Annemarie Sell Geb Patrzek Kohlekoernermikrofon

Also Published As

Publication number Publication date
FR1019736A (fr) 1953-01-26
DE844307C (de) 1952-07-17

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