FR2147264B1 - - Google Patents

Info

Publication number
FR2147264B1
FR2147264B1 FR7227119A FR7227119A FR2147264B1 FR 2147264 B1 FR2147264 B1 FR 2147264B1 FR 7227119 A FR7227119 A FR 7227119A FR 7227119 A FR7227119 A FR 7227119A FR 2147264 B1 FR2147264 B1 FR 2147264B1
Authority
FR
France
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
FR7227119A
Other languages
French (fr)
Other versions
FR2147264A1 (lm
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.)
Toshiba Corp
Original Assignee
Tokyo Shibaura Electric 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 Tokyo Shibaura Electric Co Ltd filed Critical Tokyo Shibaura Electric Co Ltd
Publication of FR2147264A1 publication Critical patent/FR2147264A1/fr
Application granted granted Critical
Publication of FR2147264B1 publication Critical patent/FR2147264B1/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
    • H04R19/00—Electrostatic transducers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G7/00—Capacitors in which the capacitance is varied by non-mechanical means; Processes of their manufacture
    • H01G7/02—Electrets, i.e. having a permanently-polarised dielectric

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Filtering Materials (AREA)
FR7227119A 1971-07-28 1972-07-27 Expired FR2147264B1 (lm)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5601771A JPS5115599B1 (lm) 1971-07-28 1971-07-28

Publications (2)

Publication Number Publication Date
FR2147264A1 FR2147264A1 (lm) 1973-03-09
FR2147264B1 true FR2147264B1 (lm) 1976-03-12

Family

ID=13015277

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7227119A Expired FR2147264B1 (lm) 1971-07-28 1972-07-27

Country Status (4)

Country Link
JP (1) JPS5115599B1 (lm)
DE (1) DE2237413A1 (lm)
FR (1) FR2147264B1 (lm)
GB (1) GB1340158A (lm)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE382297B (sv) * 1974-08-15 1976-01-19 Ericsson Telefon Ab L M Forfarande for framstellning av en elektretmikrofon med ett noggrant bestemt luftgap.
JPS55157223A (en) * 1979-05-25 1980-12-06 Tokyo Shibaura Electric Co Method of manufacturing electret
AT374326B (de) * 1982-07-22 1984-04-10 Akg Akustische Kino Geraete Elektrostatischer wandler, insbesondere kondensatormikrophon

Also Published As

Publication number Publication date
FR2147264A1 (lm) 1973-03-09
DE2237413A1 (de) 1973-02-08
GB1340158A (en) 1973-12-12
JPS5115599B1 (lm) 1976-05-18

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Legal Events

Date Code Title Description
ST Notification of lapse