BE374582A - - Google Patents

Info

Publication number
BE374582A
BE374582A BE374582DA BE374582A BE 374582 A BE374582 A BE 374582A BE 374582D A BE374582D A BE 374582DA BE 374582 A BE374582 A BE 374582A
Authority
BE
Belgium
Application number
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.)
Publication of BE374582A publication Critical patent/BE374582A/xx

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R21/00Variable-resistance transducers
    • H04R21/02Microphones
    • H04R21/021Microphones 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)
BE374582D 1930-02-21 BE374582A (en:Method)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5809/30A GB348716A (en) 1930-02-21 1930-02-21 Improvements in or relating to telephone transmitters

Publications (1)

Publication Number Publication Date
BE374582A true BE374582A (en:Method)

Family

ID=9803011

Family Applications (1)

Application Number Title Priority Date Filing Date
BE374582D BE374582A (en:Method) 1930-02-21

Country Status (5)

Country Link
US (1) US1952889A (en:Method)
BE (1) BE374582A (en:Method)
FR (1) FR705756A (en:Method)
GB (1) GB348716A (en:Method)
NL (1) NL32162C (en:Method)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5181253A (en) * 1991-01-08 1993-01-19 Southern Audio Services, Inc. Loudspeaker assembly
US7480209B2 (en) * 2007-05-29 2009-01-20 Harris Corporation Submersible loudspeaker assembly

Also Published As

Publication number Publication date
GB348716A (en) 1931-05-21
NL32162C (en:Method)
FR705756A (fr) 1931-06-12
US1952889A (en) 1934-03-27

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