DE602492C - Mikrophon mit Kohlekoernerfuellung - Google Patents

Mikrophon mit Kohlekoernerfuellung

Info

Publication number
DE602492C
DE602492C DEL80593D DEL0080593D DE602492C DE 602492 C DE602492 C DE 602492C DE L80593 D DEL80593 D DE L80593D DE L0080593 D DEL0080593 D DE L0080593D DE 602492 C DE602492 C DE 602492C
Authority
DE
Germany
Prior art keywords
microphone
carbon
membrane
electrode
microphone according
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
DEL80593D
Other languages
German (de)
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.)
Individual
Original Assignee
Individual
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
Priority to GB4472/32A priority Critical patent/GB382165A/en
Application filed by Individual filed Critical Individual
Priority to DEL80593D priority patent/DE602492C/de
Priority to FR732482D priority patent/FR732482A/fr
Priority to BE386838D priority patent/BE386838A/xx
Application granted granted Critical
Publication of DE602492C publication Critical patent/DE602492C/de
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)
DEL80593D 1932-02-15 1932-02-26 Mikrophon mit Kohlekoernerfuellung Expired DE602492C (de)

Priority Applications (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
FR732482D FR732482A (fr) 1932-02-15 1932-02-29 Perfectionnements dans les microphones
BE386838D BE386838A (no) 1932-02-15 1932-03-01

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
DE602492C true DE602492C (de) 1934-09-13

Family

ID=9777816

Family Applications (1)

Application Number Title Priority Date Filing Date
DEL80593D Expired DE602492C (de) 1932-02-15 1932-02-26 Mikrophon mit Kohlekoernerfuellung

Country Status (4)

Country Link
BE (1) BE386838A (no)
DE (1) DE602492C (no)
FR (1) FR732482A (no)
GB (1) GB382165A (no)

Also Published As

Publication number Publication date
FR732482A (fr) 1932-09-21
BE386838A (no) 1932-04-30
GB382165A (en) 1932-10-20

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