IT991799B - Lamina ad elettrete particolarmente per microfoni ed altoparlanti elet trostatici - Google Patents

Lamina ad elettrete particolarmente per microfoni ed altoparlanti elet trostatici

Info

Publication number
IT991799B
IT991799B IT6915873A IT6915873A IT991799B IT 991799 B IT991799 B IT 991799B IT 6915873 A IT6915873 A IT 6915873A IT 6915873 A IT6915873 A IT 6915873A IT 991799 B IT991799 B IT 991799B
Authority
IT
Italy
Prior art keywords
speakers
electrical foil
foil especially
electric microphones
microphones
Prior art date
Application number
IT6915873A
Other languages
English (en)
Original Assignee
Philips Nv
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 Philips Nv filed Critical Philips Nv
Application granted granted Critical
Publication of IT991799B publication Critical patent/IT991799B/it

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
    • H04R19/01—Electrostatic transducers characterised by the use of electrets
    • 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
    • H01G7/021—Electrets, i.e. having a permanently-polarised dielectric having an organic dielectric
    • H01G7/023—Electrets, i.e. having a permanently-polarised dielectric having an organic dielectric of macromolecular compounds

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Laminated Bodies (AREA)
IT6915873A 1972-07-21 1973-07-18 Lamina ad elettrete particolarmente per microfoni ed altoparlanti elet trostatici IT991799B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7210088A NL7210088A (it) 1972-07-21 1972-07-21

Publications (1)

Publication Number Publication Date
IT991799B true IT991799B (it) 1975-08-30

Family

ID=19816577

Family Applications (1)

Application Number Title Priority Date Filing Date
IT6915873A IT991799B (it) 1972-07-21 1973-07-18 Lamina ad elettrete particolarmente per microfoni ed altoparlanti elet trostatici

Country Status (8)

Country Link
JP (2) JPS4946426A (it)
AT (1) AT326197B (it)
DE (1) DE2333418C2 (it)
FR (1) FR2194028B1 (it)
GB (1) GB1394347A (it)
IN (1) IN139061B (it)
IT (1) IT991799B (it)
NL (1) NL7210088A (it)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL179104C (nl) * 1974-03-15 1986-07-01 Philips Nv Elektrostatische transducent.
JPS5112125A (ja) * 1974-07-19 1976-01-30 Matsushita Electric Ind Co Ltd Erekutoretsutodenkionkyohenkanki
SE382297B (sv) * 1974-08-15 1976-01-19 Ericsson Telefon Ab L M Forfarande for framstellning av en elektretmikrofon med ett noggrant bestemt luftgap.
JPS5430300B1 (it) * 1975-01-21 1979-09-29
JPS5814317B2 (ja) * 1976-04-20 1983-03-18 松下電器産業株式会社 電気感応記録紙
CA1150816A (en) * 1979-07-06 1983-07-26 Ronald Else Method and apparatus for implanting a charge in an electret foil
FI20070155A0 (fi) 2007-02-23 2007-02-23 Panphonics Oy Elektreettilevyrakenne
DE102008013942A1 (de) * 2008-03-12 2009-09-17 Nanogate Ag Beschichtete Kunststofffolie

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1789091B2 (de) * 1967-05-15 1974-04-04 Thermo Electron Corp., Waltham, Mass. (V.St.A.) Elektret sowie Verfahren und Vorrichtung zu seiner Herstellung. Ausscheidung aus: 1639444
NL143362B (nl) * 1968-07-10 1974-09-16 Tno Werkwijze voor het formeren van een eenzijdig gemetalliseerde elektreetfoelie, alsmede zulk een elektreetfoelie geformeerd volgens deze werkwijze.
GB1302590A (it) * 1969-09-10 1973-01-10
JPS4857614A (it) * 1971-11-17 1973-08-13

Also Published As

Publication number Publication date
JPS4946426A (it) 1974-05-04
IN139061B (it) 1976-05-01
GB1394347A (en) 1975-05-14
ATA633673A (de) 1975-02-15
FR2194028A1 (it) 1974-02-22
JPS55133699U (it) 1980-09-22
NL7210088A (it) 1974-01-23
AT326197B (de) 1975-11-25
FR2194028B1 (it) 1977-02-18
DE2333418A1 (de) 1974-01-31
DE2333418C2 (de) 1985-01-10

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