FR732482A - Perfectionnements dans les microphones - Google Patents

Perfectionnements dans les microphones

Info

Publication number
FR732482A
FR732482A FR732482DA FR732482A FR 732482 A FR732482 A FR 732482A FR 732482D A FR732482D A FR 732482DA FR 732482 A FR732482 A FR 732482A
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)
French (fr)
Inventor
William Roe Lane
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 filed Critical
Application granted granted Critical
Publication of FR732482A publication Critical patent/FR732482A/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)
  • Telephone Set Structure (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
FR732482D 1932-02-15 1932-02-29 Perfectionnements dans les microphones Expired FR732482A (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB4472/32A GB382165A (en) 1932-02-15 1932-02-15 Improvements in and relating to microphones
DEL80593D DE602492C (de) 1932-02-15 1932-02-26 Mikrophon mit Kohlekoernerfuellung
FR732482T 1932-02-29
BE386838T 1932-03-01

Publications (1)

Publication Number Publication Date
FR732482A true FR732482A (fr) 1932-09-21

Family

ID=9777816

Family Applications (1)

Application Number Title Priority Date Filing Date
FR732482D Expired FR732482A (fr) 1932-02-15 1932-02-29 Perfectionnements dans les microphones

Country Status (4)

Country Link
BE (1) BE386838A (US06265458-20010724-C00056.png)
DE (1) DE602492C (US06265458-20010724-C00056.png)
FR (1) FR732482A (US06265458-20010724-C00056.png)
GB (1) GB382165A (US06265458-20010724-C00056.png)

Also Published As

Publication number Publication date
GB382165A (en) 1932-10-20
DE602492C (de) 1934-09-13
BE386838A (US06265458-20010724-C00056.png) 1932-04-30

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