FR714858A - Microphone refinements - Google Patents

Microphone refinements

Info

Publication number
FR714858A
FR714858A FR714858DA FR714858A FR 714858 A FR714858 A FR 714858A FR 714858D A FR714858D A FR 714858DA FR 714858 A FR714858 A FR 714858A
Authority
FR
France
Prior art keywords
refinements
microphone
microphone refinements
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.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi 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 Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Application granted granted Critical
Publication of FR714858A publication Critical patent/FR714858A/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
    • H04R21/026—Microphones in which the sound is perpendicular to the current crossing the transducer material

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR714858D 1930-04-08 1931-04-07 Microphone refinements Expired FR714858A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB714858X 1930-04-08

Publications (1)

Publication Number Publication Date
FR714858A true FR714858A (en) 1931-11-21

Family

ID=10494561

Family Applications (1)

Application Number Title Priority Date Filing Date
FR714858D Expired FR714858A (en) 1930-04-08 1931-04-07 Microphone refinements

Country Status (1)

Country Link
FR (1) FR714858A (en)

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