ES485653A1 - Perfeccionamientos en conjuntos de capsulas microfonicas de electreto para telefono - Google Patents

Perfeccionamientos en conjuntos de capsulas microfonicas de electreto para telefono

Info

Publication number
ES485653A1
ES485653A1 ES485653A ES485653A ES485653A1 ES 485653 A1 ES485653 A1 ES 485653A1 ES 485653 A ES485653 A ES 485653A ES 485653 A ES485653 A ES 485653A ES 485653 A1 ES485653 A1 ES 485653A1
Authority
ES
Spain
Prior art keywords
electret
printed circuit
electret microphone
boards
arrangement
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
ES485653A
Other languages
English (en)
Spanish (es)
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.)
Nortel Networks Ltd
Original Assignee
Northern Telecom 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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Publication of ES485653A1 publication Critical patent/ES485653A1/es
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R19/00—Electrostatic transducers
    • H04R19/01—Electrostatic transducers characterised by the use of electrets

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Telephone Set Structure (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
ES485653A 1978-11-03 1979-11-02 Perfeccionamientos en conjuntos de capsulas microfonicas de electreto para telefono Expired ES485653A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA315,771A CA1107382A (fr) 1978-11-03 1978-11-03 Microphone a electret a raccords electriques simplifies sur plaquette de circuit imprime

Publications (1)

Publication Number Publication Date
ES485653A1 true ES485653A1 (es) 1980-05-16

Family

ID=4112877

Family Applications (1)

Application Number Title Priority Date Filing Date
ES485653A Expired ES485653A1 (es) 1978-11-03 1979-11-02 Perfeccionamientos en conjuntos de capsulas microfonicas de electreto para telefono

Country Status (5)

Country Link
EP (1) EP0012176A1 (fr)
JP (1) JPS5566199A (fr)
BR (1) BR7907133A (fr)
CA (1) CA1107382A (fr)
ES (1) ES485653A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE428081B (sv) * 1981-10-07 1983-05-30 Ericsson Telefon Ab L M Tilledningsram for en elektretmikrofon
US4492825A (en) * 1982-07-28 1985-01-08 At&T Bell Laboratories Electroacoustic transducer
SE438233B (sv) * 1983-08-19 1985-04-01 Ericsson Telefon Ab L M Elektretmikrofon
DK62484D0 (da) * 1984-02-13 1984-02-13 Gnt Automatic As Kombineret transducerenhed til mikrotelefon
GB2231235B (en) * 1989-05-05 1993-11-10 Transfer Technology Ltd Electroacoustical transducer
US6842964B1 (en) 2000-09-29 2005-01-18 Tucker Davis Technologies, Inc. Process of manufacturing of electrostatic speakers
JP4522696B2 (ja) 2002-04-11 2010-08-11 リオン株式会社 電気音響変換器

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1252258C2 (de) * 1965-04-13 1974-06-20 Nach dem elektrostatischen prinzip arbeitender elektroakustischer wandler und verfahren zu seiner herstellung
GB1268654A (en) * 1969-08-12 1972-03-29 Plessey Co Ltd Electroacoustic transducers
US3663768A (en) * 1971-01-15 1972-05-16 Northern Electric Co Electret transducer
JPS4861126A (fr) * 1971-12-02 1973-08-27
DE2257680A1 (de) * 1971-12-11 1973-06-14 Primo Co Ltd Manufacturers & M Kompaktmikrophon
FR2220952A1 (fr) * 1973-03-07 1974-10-04 Arvin Ind Inc
JPS5419172B2 (fr) * 1973-07-23 1979-07-13
CH583489A5 (en) * 1975-01-07 1976-12-31 Gfeller Ag Apparate Fabrik Fla Microphone capsule for telephone - has preamplifier filter and main amplifier coupled to electret microphone
NL7802688A (nl) * 1978-03-13 1979-09-17 Philips Nv Inrichting voor het omzetten van akoestische in elektrische trillingen en omgekeerd, voor- zien van tenminste een kondensator elektreet- element aangesloten op een elektronische schakeling.

Also Published As

Publication number Publication date
JPS5566199A (en) 1980-05-19
CA1107382A (fr) 1981-08-18
EP0012176A1 (fr) 1980-06-25
BR7907133A (pt) 1980-07-22

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