FR477210A - Perfectionnement aux microphones - Google Patents

Perfectionnement aux microphones

Info

Publication number
FR477210A
FR477210A FR477210DA FR477210A FR 477210 A FR477210 A FR 477210A FR 477210D A FR477210D A FR 477210DA FR 477210 A FR477210 A FR 477210A
Authority
FR
France
Prior art keywords
microphone
development
microphone development
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.)
Lavandeyra & Orner De
Original Assignee
Lavandeyra & Orner De
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 Lavandeyra & Orner De filed Critical Lavandeyra & Orner De
Application granted granted Critical
Publication of FR477210A publication Critical patent/FR477210A/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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R21/00—Variable-resistance transducers
    • H04R21/02—Microphones
    • H04R21/023—Microphones with more than one granular chamber

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR477210D 1914-06-03 1914-06-03 Perfectionnement aux microphones Expired FR477210A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR477210T 1914-06-03

Publications (1)

Publication Number Publication Date
FR477210A true FR477210A (fr) 1915-10-06

Family

ID=1514895

Family Applications (1)

Application Number Title Priority Date Filing Date
FR477210D Expired FR477210A (fr) 1914-06-03 1914-06-03 Perfectionnement aux microphones

Country Status (1)

Country Link
FR (1) FR477210A (fr)

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