FR740504A - Improvements made to microphone capsules - Google Patents

Improvements made to microphone capsules

Info

Publication number
FR740504A
FR740504A FR740504DA FR740504A FR 740504 A FR740504 A FR 740504A FR 740504D A FR740504D A FR 740504DA FR 740504 A FR740504 A FR 740504A
Authority
FR
France
Prior art keywords
improvements made
microphone capsules
capsules
microphone
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
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.)
Association des Ouvriers en Instruments de Precision
Original Assignee
Association des Ouvriers en Instruments de Precision
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 Association des Ouvriers en Instruments de Precision filed Critical Association des Ouvriers en Instruments de Precision
Application granted granted Critical
Publication of FR740504A publication Critical patent/FR740504A/en
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)
FR740504D 1931-07-27 1932-07-26 Improvements made to microphone capsules Expired FR740504A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE740504X 1931-07-27

Publications (1)

Publication Number Publication Date
FR740504A true FR740504A (en) 1933-01-27

Family

ID=3879431

Family Applications (1)

Application Number Title Priority Date Filing Date
FR740504D Expired FR740504A (en) 1931-07-27 1932-07-26 Improvements made to microphone capsules

Country Status (2)

Country Link
BE (1) BE381615A (en)
FR (1) FR740504A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1003263B (en) * 1953-01-05 1957-02-28 Krone Kg Electrode arrangement for speaking capsules filled with charcoal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1003263B (en) * 1953-01-05 1957-02-28 Krone Kg Electrode arrangement for speaking capsules filled with charcoal

Also Published As

Publication number Publication date
BE381615A (en)

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