DE270399C - - Google Patents

Info

Publication number
DE270399C
DE270399C DENDAT270399D DE270399DA DE270399C DE 270399 C DE270399 C DE 270399C DE NDAT270399 D DENDAT270399 D DE NDAT270399D DE 270399D A DE270399D A DE 270399DA DE 270399 C DE270399 C DE 270399C
Authority
DE
Germany
Prior art keywords
chamber
record
attached
double
grain
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
DENDAT270399D
Other languages
German (de)
English (en)
Publication of DE270399C publication Critical patent/DE270399C/de
Active legal-status Critical Current

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
    • H04R21/023—Microphones with more than one granular chamber

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
DENDAT270399D Active DE270399C (oth)

Publications (1)

Publication Number Publication Date
DE270399C true DE270399C (oth)

Family

ID=527149

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT270399D Active DE270399C (oth)

Country Status (1)

Country Link
DE (1) DE270399C (oth)

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