GB310513A - Improvements in or relating to microphones - Google Patents

Improvements in or relating to microphones

Info

Publication number
GB310513A
GB310513A GB9546/29A GB954629A GB310513A GB 310513 A GB310513 A GB 310513A GB 9546/29 A GB9546/29 A GB 9546/29A GB 954629 A GB954629 A GB 954629A GB 310513 A GB310513 A GB 310513A
Authority
GB
United Kingdom
Prior art keywords
electrodes
microphones
carbon
relating
plainized
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
GB9546/29A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB310513A publication Critical patent/GB310513A/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; ELECTRIC HEARING AIDS; 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)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
GB9546/29A 1928-04-27 1929-03-25 Improvements in or relating to microphones Expired GB310513A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL310513X 1928-04-27

Publications (1)

Publication Number Publication Date
GB310513A true GB310513A (en) 1930-02-27

Family

ID=19783616

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9546/29A Expired GB310513A (en) 1928-04-27 1929-03-25 Improvements in or relating to microphones

Country Status (3)

Country Link
FR (1) FR672159A (enExample)
GB (1) GB310513A (enExample)
NL (1) NL25231C (enExample)

Also Published As

Publication number Publication date
FR672159A (fr) 1929-12-24
NL25231C (enExample)

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