DE227745C - - Google Patents

Info

Publication number
DE227745C
DE227745C DENDAT227745D DE227745DA DE227745C DE 227745 C DE227745 C DE 227745C DE NDAT227745 D DENDAT227745 D DE NDAT227745D DE 227745D A DE227745D A DE 227745DA DE 227745 C DE227745 C DE 227745C
Authority
DE
Germany
Prior art keywords
membrane
sound
horn
sound waves
cap
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
DENDAT227745D
Other languages
German (de)
English (en)
Publication of DE227745C publication Critical patent/DE227745C/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; 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)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
DENDAT227745D Active DE227745C (OSRAM)

Publications (1)

Publication Number Publication Date
DE227745C true DE227745C (OSRAM)

Family

ID=488181

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT227745D Active DE227745C (OSRAM)

Country Status (1)

Country Link
DE (1) DE227745C (OSRAM)

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