NL142046B - Koolmicrofoon. - Google Patents

Koolmicrofoon.

Info

Publication number
NL142046B
NL142046B NL62275488A NL275488A NL142046B NL 142046 B NL142046 B NL 142046B NL 62275488 A NL62275488 A NL 62275488A NL 275488 A NL275488 A NL 275488A NL 142046 B NL142046 B NL 142046B
Authority
NL
Netherlands
Prior art keywords
carbon microphone
microphone
carbon
Prior art date
Application number
NL62275488A
Other languages
English (en)
Original Assignee
Siemens Ag
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 Ag filed Critical Siemens Ag
Publication of NL142046B publication Critical patent/NL142046B/nl

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
    • 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

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Measuring Fluid Pressure (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Telephone Set Structure (AREA)
NL62275488A 1961-03-02 1962-03-02 Koolmicrofoon. NL142046B (nl)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES72788A DE1161314B (de) 1961-03-02 1961-03-02 Kohlemikrofonkapsel mit feuchtigkeitsgeschuetzter Kohlekammer

Publications (1)

Publication Number Publication Date
NL142046B true NL142046B (nl) 1974-04-16

Family

ID=7503475

Family Applications (2)

Application Number Title Priority Date Filing Date
NL275488D NL275488A (nl) 1961-03-02
NL62275488A NL142046B (nl) 1961-03-02 1962-03-02 Koolmicrofoon.

Family Applications Before (1)

Application Number Title Priority Date Filing Date
NL275488D NL275488A (nl) 1961-03-02

Country Status (7)

Country Link
US (1) US3277247A (nl)
BE (1) BE614554A (nl)
CH (1) CH402950A (nl)
DE (1) DE1161314B (nl)
GB (1) GB957384A (nl)
NL (2) NL142046B (nl)
SE (1) SE325613B (nl)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE898763C (de) * 1937-04-19 1953-12-03 Int Standard Electric Corp Kohlekoernermikrofon
CH220358A (de) * 1940-10-26 1942-03-31 Fides Gmbh Kapselmikrofon.
NL70196C (nl) * 1947-10-31
DE1000049B (de) * 1954-12-23 1957-01-03 Merk Ag Telefonbau Friedrich Widerstandsmikrophon, insbesondere Kohlemikrophon

Also Published As

Publication number Publication date
DE1161314B (de) 1964-01-16
CH402950A (de) 1965-11-30
SE325613B (nl) 1970-07-06
US3277247A (en) 1966-10-04
GB957384A (en) 1964-05-06
BE614554A (fr) 1962-07-02
NL275488A (nl)

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