FR425338A - Microphone - Google Patents

Microphone

Info

Publication number
FR425338A
FR425338A FR425338A FR425338DA FR425338A FR 425338 A FR425338 A FR 425338A FR 425338 A FR425338 A FR 425338A FR 425338D A FR425338D A FR 425338DA FR 425338 A FR425338 A FR 425338A
Authority
FR
France
Prior art keywords
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
FR425338A
Other languages
English (en)
French (fr)
Inventor
Guillaume Arnaud Nussbaum
John Augustus Frederic Steinhoff
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.)
JOHN AUGUSTUS FREDERIC STEINHO
Original Assignee
JOHN AUGUSTUS FREDERIC STEINHO
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 JOHN AUGUSTUS FREDERIC STEINHO filed Critical JOHN AUGUSTUS FREDERIC STEINHO
Application granted granted Critical
Publication of FR425338A publication Critical patent/FR425338A/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
    • H04R21/021—Microphones with granular resistance material

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
FR425338A 1910-02-09 1911-01-28 Microphone Expired FR425338A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191003179T 1910-02-09

Publications (1)

Publication Number Publication Date
FR425338A true FR425338A (fr) 1911-06-08

Family

ID=32560560

Family Applications (1)

Application Number Title Priority Date Filing Date
FR425338A Expired FR425338A (fr) 1910-02-09 1911-01-28 Microphone

Country Status (3)

Country Link
DE (1) DE243505C (enExample)
FR (1) FR425338A (enExample)
GB (1) GB191003179A (enExample)

Also Published As

Publication number Publication date
GB191003179A (en) 1910-11-03
DE243505C (enExample)

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