FR404226A - Perfectionnements apportés aux microphones - Google Patents

Perfectionnements apportés aux microphones

Info

Publication number
FR404226A
FR404226A FR404226DA FR404226A FR 404226 A FR404226 A FR 404226A FR 404226D A FR404226D A FR 404226DA FR 404226 A FR404226 A FR 404226A
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)
Inventor
Waldemar-Otto-Goswin Droop
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.)
WALDEMAR-OTTO-GOSWIN DROOP
Original Assignee
WALDEMAR-OTTO-GOSWIN DROOP
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 WALDEMAR-OTTO-GOSWIN DROOP filed Critical WALDEMAR-OTTO-GOSWIN DROOP
Application granted granted Critical
Publication of FR404226A publication Critical patent/FR404226A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR404226D 1909-06-19 1909-06-19 Perfectionnements apportés aux microphones Expired FR404226A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR404226T 1909-06-19

Publications (1)

Publication Number Publication Date
FR404226A true FR404226A (fr) 1909-11-25

Family

ID=1448802

Family Applications (1)

Application Number Title Priority Date Filing Date
FR404226D Expired FR404226A (fr) 1909-06-19 1909-06-19 Perfectionnements apportés aux microphones

Country Status (1)

Country Link
FR (1) FR404226A (fr)

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