FR642446A - Capsule microphonique avec diaphragme en charbon - Google Patents

Capsule microphonique avec diaphragme en charbon

Info

Publication number
FR642446A
FR642446A FR642446DA FR642446A FR 642446 A FR642446 A FR 642446A FR 642446D A FR642446D A FR 642446DA FR 642446 A FR642446 A FR 642446A
Authority
FR
France
Prior art keywords
microphone capsule
carbon diaphragm
diaphragm
carbon
capsule
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.)
Expired
Application number
Other languages
English (en)
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Neufeldt & Kuhnke Betr Sgesell
Original Assignee
Neufeldt & Kuhnke Betr Sgesell
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 Neufeldt & Kuhnke Betr Sgesell filed Critical Neufeldt & Kuhnke Betr Sgesell
Application granted granted Critical
Publication of FR642446A publication Critical patent/FR642446A/fr
Expired 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)
FR642446D 1926-10-22 1927-10-15 Capsule microphonique avec diaphragme en charbon Expired FR642446A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE642446X 1926-10-22

Publications (1)

Publication Number Publication Date
FR642446A true FR642446A (fr) 1928-08-28

Family

ID=6580253

Family Applications (1)

Application Number Title Priority Date Filing Date
FR642446D Expired FR642446A (fr) 1926-10-22 1927-10-15 Capsule microphonique avec diaphragme en charbon

Country Status (2)

Country Link
BE (1) BE345858A (xx)
FR (1) FR642446A (xx)

Also Published As

Publication number Publication date
BE345858A (xx)

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