DK140578B - Elektretomsætter og fremgangsmåde til fremstilling heraf. - Google Patents

Elektretomsætter og fremgangsmåde til fremstilling heraf.

Info

Publication number
DK140578B
DK140578B DK554172AA DK554172A DK140578B DK 140578 B DK140578 B DK 140578B DK 554172A A DK554172A A DK 554172AA DK 554172 A DK554172 A DK 554172A DK 140578 B DK140578 B DK 140578B
Authority
DK
Denmark
Prior art keywords
manufacture
electricity converter
converter
electricity
Prior art date
Application number
DK554172AA
Other languages
Danish (da)
English (en)
Other versions
DK140578C (fr
Inventor
Thomas Harold Schmitt
Elmer Victor Carlson
Mead Clifford Killion
Original Assignee
Industrial Res Prod Inc
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 Industrial Res Prod Inc filed Critical Industrial Res Prod Inc
Publication of DK140578B publication Critical patent/DK140578B/da
Application granted granted Critical
Publication of DK140578C publication Critical patent/DK140578C/da

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
    • 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
    • H04R19/01—Electrostatic transducers characterised by the use of electrets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2207/00—Details of diaphragms or cones for electromechanical transducers or their suspension covered by H04R7/00 but not provided for in H04R7/00 or in H04R2307/00
    • H04R2207/021—Diaphragm extensions, not necessarily integrally formed, e.g. skirts, rims, flanges

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
DK554172AA 1971-11-08 1972-11-08 Elektretomsætter og fremgangsmåde til fremstilling heraf. DK140578B (da)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US19659271A 1971-11-08 1971-11-08
US19667771A 1971-11-08 1971-11-08

Publications (2)

Publication Number Publication Date
DK140578B true DK140578B (da) 1979-10-01
DK140578C DK140578C (fr) 1980-02-18

Family

ID=26892043

Family Applications (1)

Application Number Title Priority Date Filing Date
DK554172AA DK140578B (da) 1971-11-08 1972-11-08 Elektretomsætter og fremgangsmåde til fremstilling heraf.

Country Status (7)

Country Link
JP (1) JPS5148067B2 (fr)
CH (1) CH556628A (fr)
DK (1) DK140578B (fr)
FR (1) FR2159372B1 (fr)
GB (1) GB1398171A (fr)
NL (1) NL166835C (fr)
SE (1) SE378500B (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57188105A (en) * 1981-05-14 1982-11-19 Toshiba Corp Electret constituent

Also Published As

Publication number Publication date
JPS5148067B2 (fr) 1976-12-18
DE2254692B2 (de) 1976-08-05
CH556628A (de) 1974-11-29
NL166835B (nl) 1981-04-15
GB1398171A (en) 1975-06-18
DK140578C (fr) 1980-02-18
NL7214357A (fr) 1973-05-10
DE2254692A1 (de) 1973-05-10
JPS4859824A (fr) 1973-08-22
FR2159372A1 (fr) 1973-06-22
FR2159372B1 (fr) 1977-08-26
SE378500B (fr) 1975-09-01
NL166835C (nl) 1981-09-15

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