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FR801693A - Perfectionnements apportés aux microphones - Google Patents

Perfectionnements apportés aux microphones

Info

Publication number
FR801693A
FR801693A FR801693DA FR801693A FR 801693 A FR801693 A FR 801693A FR 801693D A FR801693D A FR 801693DA FR 801693 A FR801693 A FR 801693A
Authority
FR
France
Prior art keywords
microphones
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)
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.)
Siemens Brothers and Co Ltd
Original Assignee
Siemens Brothers and Co Ltd
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 Siemens Brothers and Co Ltd filed Critical Siemens Brothers and Co Ltd
Application granted granted Critical
Publication of FR801693A publication Critical patent/FR801693A/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)
FR801693D 1935-02-07 1936-02-03 Perfectionnements apportés aux microphones Expired FR801693A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB801693X 1935-02-07

Publications (1)

Publication Number Publication Date
FR801693A true FR801693A (fr) 1936-08-13

Family

ID=10513601

Family Applications (1)

Application Number Title Priority Date Filing Date
FR801693D Expired FR801693A (fr) 1935-02-07 1936-02-03 Perfectionnements apportés aux microphones

Country Status (2)

Country Link
BE (1) BE413126A (fr)
FR (1) FR801693A (fr)

Also Published As

Publication number Publication date
BE413126A (fr)

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