ES485653A1 - Electret microphone. - Google Patents

Electret microphone.

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
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/en
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
    • 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)

Abstract

A telephone transmitter sub-assembly has an electret clamped between a pair of printed circuit boards. The electret conducting surface and printed circuit patterns on the boards have an overlapping arrangement at a planar junction. The arrangement connects a capacitor, of which the electret forms part, into an amplifying circuit.
ES485653A 1978-11-03 1979-11-02 Electret microphone. Expired ES485653A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA315,771A CA1107382A (en) 1978-11-03 1978-11-03 Electret microphone with simplified electrical connections by printed circuit board mounting

Publications (1)

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

Family

ID=4112877

Family Applications (1)

Application Number Title Priority Date Filing Date
ES485653A Expired ES485653A1 (en) 1978-11-03 1979-11-02 Electret microphone.

Country Status (5)

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

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE428081B (en) * 1981-10-07 1983-05-30 Ericsson Telefon Ab L M ADDITION FRAME FOR AN ELECTRIC MICROPHONE
US4492825A (en) * 1982-07-28 1985-01-08 At&T Bell Laboratories Electroacoustic transducer
SE438233B (en) * 1983-08-19 1985-04-01 Ericsson Telefon Ab L M electret
DK62484D0 (en) * 1984-02-13 1984-02-13 Gnt Automatic As COMBINED TRANSDUCER UNIT FOR MICROPHONE PHONE
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
US6804363B2 (en) 2002-04-11 2004-10-12 Rion Co., Ltd. Electroacoustic transducer

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1252258C2 (en) * 1965-04-13 1974-06-20 ELECTROSTATIC PRINCIPLE OPERATING ELECTROACOUSTIC CONVERTER AND METHOD FOR ITS PRODUCTION
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 (en) * 1971-12-02 1973-08-27
DE2257680A1 (en) * 1971-12-11 1973-06-14 Primo Co Ltd Manufacturers & M COMPACT MICROPHONE
FR2220952A1 (en) * 1973-03-07 1974-10-04 Arvin Ind Inc
JPS5419172B2 (en) * 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 (en) * 1978-03-13 1979-09-17 Philips Nv DEVICE FOR CONVERSION FROM ACOUSTIC TO ELECTRICAL VIBRATIONS AND VERSIONS, EQUIPPED WITH AT LEAST ONE CONDENSER ELECTRICAL ELEMENT CONNECTED TO AN ELECTRONIC CIRCUIT.

Also Published As

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

Similar Documents

Publication Publication Date Title
IE782073L (en) Acoustic terminal unit
ATE149277T1 (en) HEAD-WEARABLE HEARING AID
GB775854A (en) Condenser-loudspeaker for reproduction of the higher frequency bands in the audible range and in which a foil is applied to a perforated metal sheet
IT8223615A0 (en) CONDUCTING FRAME FOR AN ELECTRET MICROPHONE.
DE3850685D1 (en) Portable cordless telephone that generates several different audio signals using a simple circuit.
ES485653A1 (en) Electret microphone.
AU497007B2 (en) Telephone amplifier circuit
AU523076B2 (en) Electret transducer with integrated electronic circuit
ES456442A1 (en) Smoothing or pressing iron
ES468174A1 (en) Temperature-stable electret microphone with embossed, small area, electret
IT7821471A0 (en) CIRCUIT ARRANGEMENT FOR A TELEPHONE SET EQUIPPED WITH A SPEAKER AND CONTROLLED BY VOICE.
AU543339B2 (en) Electronic tone ringer, for telephone subset
DE3167233D1 (en) Circuit for connecting an active microphone, in particular with an electret, to a telephone transmission circuit
US4101871A (en) Touch-tone encoder unit for mobile radio transmitter
ATE940T1 (en) MICROPHONE AMPLIFIERS, PARTICULARLY FOR TELEPHONE EQUIPMENT.
IT8224414A0 (en) CIRCUIT ARRANGEMENT FOR A TELEPHONE SET FOR HANDS-FREE COMMUNICATIONS.
JPS5330803A (en) Voice communication system
ATE6972T1 (en) CIRCUIT ARRANGEMENT FOR AN ELECTRONIC DIRECT CURRENT TELEGRAPHIC TRANSMITTER.
GB2008359A (en) Improvements in or relating to audio teleconferencing
JPS51113439A (en) Negative impedance circuit
JPS53126203A (en) Telephone set circuit
SU663143A1 (en) Device for placing printed-circuit boards
ATE26782T1 (en) ELECTRONIC LINE AMPLIFIER WITH IMPEDANCE ADJUSTMENT.
JPS53106113A (en) Horn speaker
ES291910U (en) Receiver-sound player apparatus (Machine-translation by Google Translate, not legally binding)