GB383348A - Improvements of the carbon microphone - Google Patents

Improvements of the carbon microphone

Info

Publication number
GB383348A
GB383348A GB2563331A GB2563331A GB383348A GB 383348 A GB383348 A GB 383348A GB 2563331 A GB2563331 A GB 2563331A GB 2563331 A GB2563331 A GB 2563331A GB 383348 A GB383348 A GB 383348A
Authority
GB
United Kingdom
Prior art keywords
granules
electrode
moving electrode
fixed
chamber
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
GB2563331A
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.)
Siemens Brothers and Co Ltd
Original Assignee
Siemens Brothers and 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 Siemens Brothers and Co Ltd filed Critical Siemens Brothers and Co Ltd
Publication of GB383348A publication Critical patent/GB383348A/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
    • H04R21/021—Microphones with granular resistance material

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Amplitude Modulation (AREA)
GB2563331A 1936-04-17 1931-09-12 Improvements of the carbon microphone Expired GB383348A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1107536A GB471270A (en) 1936-04-17 1936-04-17 Improvements in or relating to granular microphones

Publications (1)

Publication Number Publication Date
GB383348A true GB383348A (en) 1932-11-17

Family

ID=9979554

Family Applications (2)

Application Number Title Priority Date Filing Date
GB2563331A Expired GB383348A (en) 1936-04-17 1931-09-12 Improvements of the carbon microphone
GB1107536A Expired GB471270A (en) 1936-04-17 1936-04-17 Improvements in or relating to granular microphones

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB1107536A Expired GB471270A (en) 1936-04-17 1936-04-17 Improvements in or relating to granular microphones

Country Status (3)

Country Link
BE (1) BE390588A (en:Method)
FR (1) FR742731A (en:Method)
GB (2) GB383348A (en:Method)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1061825B (de) * 1954-02-26 1959-07-23 Hans Widmaier Kohlegriessmikrophon-Sprechkapsel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1061825B (de) * 1954-02-26 1959-07-23 Hans Widmaier Kohlegriessmikrophon-Sprechkapsel

Also Published As

Publication number Publication date
BE390588A (en:Method)
FR742731A (en:Method) 1933-03-14
GB471270A (en) 1937-09-01

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