FR969788A - Microphone à électrodes en charbon - Google Patents

Microphone à électrodes en charbon

Info

Publication number
FR969788A
FR969788A FR969788DA FR969788A FR 969788 A FR969788 A FR 969788A FR 969788D A FR969788D A FR 969788DA FR 969788 A FR969788 A FR 969788A
Authority
FR
France
Prior art keywords
microphone
carbon electrodes
electrodes
carbon
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
Other languages
English (en)
French (fr)
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 Schweiz AG
Albiswerk Zuerich AG
Original Assignee
Siemens Albis AG
Albiswerk Zuerich 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 Albis AG, Albiswerk Zuerich AG filed Critical Siemens Albis AG
Application granted granted Critical
Publication of FR969788A publication Critical patent/FR969788A/fr
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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/222—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  for microphones
    • 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)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
FR969788D 1947-08-06 1948-07-30 Microphone à électrodes en charbon Expired FR969788A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH2572525X 1947-08-06

Publications (1)

Publication Number Publication Date
FR969788A true FR969788A (fr) 1950-12-26

Family

ID=4570209

Family Applications (1)

Application Number Title Priority Date Filing Date
FR969788D Expired FR969788A (fr) 1947-08-06 1948-07-30 Microphone à électrodes en charbon

Country Status (6)

Country Link
US (1) US2572525A (en, 2012)
BE (1) BE484178A (en, 2012)
CH (1) CH269350A (en, 2012)
DE (1) DE874019C (en, 2012)
FR (1) FR969788A (en, 2012)
NL (1) NL70171C (en, 2012)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE954967C (de) * 1952-11-01 1956-12-27 Standard Elek K Ag Kohlemikrofon mit einer beweglichen und einer festen Elektrode, die in mehrere Teilelektroden unterteilt ist
DE1234267B (de) * 1964-04-04 1967-02-16 Telefonbau Kohlemikrofon

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US557588A (en) * 1896-04-07 Telephony
US563395A (en) * 1896-07-07 Telephone-transmitter
US778409A (en) * 1903-04-20 1904-12-27 Oscar M Frykman Telephone apparatus.
US1117231A (en) * 1911-11-13 1914-11-17 Western Electric Co Loud-speaking transmitter.
US2179733A (en) * 1934-11-27 1939-11-14 Siemens Brothers & Co Ltd Microphone
US2149628A (en) * 1935-09-16 1939-03-07 Associated Electric Lab Inc Telephone transmitter
US2140859A (en) * 1936-12-14 1938-12-20 Siemens Ag Telephone transmitter
GB513160A (en) * 1938-03-01 1939-10-05 Donald Mcmillan Improvements in or relating to microphones
US2435920A (en) * 1943-09-20 1948-02-10 Electro Voice Mfg Co Inc Balanced granular microphone

Also Published As

Publication number Publication date
US2572525A (en) 1951-10-23
DE874019C (de) 1953-04-20
BE484178A (en, 2012)
NL70171C (en, 2012)
CH269350A (de) 1950-06-30

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