DK450682A - Electret Microphone - Google Patents

Electret Microphone Download PDF

Info

Publication number: DK450682A
Authority: DK; Denmark
Prior art keywords: electret microphone; electret; microphone
Prior art date: 1981-10-19

Application number

DK450682A

Other languages

Danish (da)

Other versions

DK153619C (en

DK153619B (en

Inventor

Guy John Chaput

Edward Matthew Sich

Beverley William Thomas Gumb

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.)

1981-10-19

Filing date

1982-10-12

Publication date

1983-04-20

1982-10-12 Application filed by Northern Telecom Ltd filed Critical Northern Telecom Ltd

1983-04-20 Publication of DK450682A publication Critical patent/DK450682A/en

1988-08-01 Publication of DK153619B publication Critical patent/DK153619B/en

1988-12-19 Application granted granted Critical

1988-12-19 Publication of DK153619C publication Critical patent/DK153619C/en

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
- H04R19/016—Electrostatic transducers characterised by the use of electrets for microphones
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/08—Mouthpieces; Microphones; Attachments therefor

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)
Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)

DK450682A 1981-10-19 1982-10-12 Electret Microphone DK153619C (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
CA388183		1981-10-19
CA000388183A CA1165859A (en)	1981-10-19	1981-10-19	Electret microphone shield

Publications (3)

Publication Number	Publication Date
DK450682A true DK450682A (en)	1983-04-20
DK153619B DK153619B (en)	1988-08-01
DK153619C DK153619C (en)	1988-12-19

Family

ID=4121192

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
DK450682A DK153619C (en)	1981-10-19	1982-10-12	Electret Microphone

Country Status (7)

Country	Link
EP (1)	EP0077615B1 (en)
JP (1)	JPS5881000A (en)
KR (1)	KR880000963B1 (en)
CA (1)	CA1165859A (en)
DE (1)	DE3270879D1 (en)
DK (1)	DK153619C (en)
IE (1)	IE53590B1 (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB2218298A (en) *	1987-11-28	1989-11-08	Anthony David Heyes	An ultra-sonic pulse-echo ranging device
DE19715365C2 (en) *	1997-04-11	1999-03-25	Sennheiser Electronic	Condenser microphone
US7439616B2 (en)	2000-11-28	2008-10-21	Knowles Electronics, Llc	Miniature silicon condenser microphone
US7166910B2 (en)	2000-11-28	2007-01-23	Knowles Electronics Llc	Miniature silicon condenser microphone
US8617934B1 (en)	2000-11-28	2013-12-31	Knowles Electronics, Llc	Methods of manufacture of top port multi-part surface mount silicon condenser microphone packages
US7434305B2 (en)	2000-11-28	2008-10-14	Knowles Electronics, Llc.	Method of manufacturing a microphone
US6781231B2 (en)	2002-09-10	2004-08-24	Knowles Electronics Llc	Microelectromechanical system package with environmental and interference shield
JP4452584B2 (en) *	2004-08-31	2010-04-21	株式会社オーディオテクニカ	Condenser microphone
DE102005008511B4 (en)	2005-02-24	2019-09-12	Tdk Corporation	MEMS microphone
DE102005008512B4 (en)	2005-02-24	2016-06-23	Epcos Ag	Electrical module with a MEMS microphone
DE102005053767B4 (en)	2005-11-10	2014-10-30	Epcos Ag	MEMS microphone, method of manufacture and method of installation
DE102005053765B4 (en)	2005-11-10	2016-04-14	Epcos Ag	MEMS package and method of manufacture
KR20080011066A (en) *	2006-07-27	2008-01-31	스타 마이크로닉스 컴퍼니 리미티드	Housing for microphone, and condenser microphone
US7894622B2 (en)	2006-10-13	2011-02-22	Merry Electronics Co., Ltd.	Microphone
US9374643B2 (en)	2011-11-04	2016-06-21	Knowles Electronics, Llc	Embedded dielectric as a barrier in an acoustic device and method of manufacture
US9078063B2 (en)	2012-08-10	2015-07-07	Knowles Electronics, Llc	Microphone assembly with barrier to prevent contaminant infiltration
US9794661B2 (en)	2015-08-07	2017-10-17	Knowles Electronics, Llc	Ingress protection for reducing particle infiltration into acoustic chamber of a MEMS microphone package

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3787642A (en) *	1971-09-27	1974-01-22	Gte Automatic Electric Lab Inc	Electrostatic transducer having resilient electrode
US3778561A (en) *	1972-06-21	1973-12-11	Bell Canada Northern Electric	Electret microphone
JPS5419172B2 (en) *	1973-07-23	1979-07-13
JPS5717013Y2 (en) *	1977-07-11	1982-04-09
US4188513A (en) *	1978-11-03	1980-02-12	Northern Telecom Limited	Electret microphone with simplified electrical connections by printed circuit board mounting

1981
- 1981-10-19 CA CA000388183A patent/CA1165859A/en not_active Expired
1982
- 1982-09-30 DE DE8282305196T patent/DE3270879D1/en not_active Expired
- 1982-09-30 EP EP82305196A patent/EP0077615B1/en not_active Expired
- 1982-10-12 DK DK450682A patent/DK153619C/en not_active IP Right Cessation
- 1982-10-18 KR KR8204689A patent/KR880000963B1/en active
- 1982-10-18 JP JP57181516A patent/JPS5881000A/en active Pending
- 1982-10-18 IE IE2516/82A patent/IE53590B1/en unknown

Also Published As

Publication number	Publication date
IE53590B1 (en)	1988-12-21
DE3270879D1 (en)	1986-06-05
JPS5881000A (en)	1983-05-16
EP0077615B1 (en)	1986-04-30
EP0077615A1 (en)	1983-04-27
KR840002387A (en)	1984-06-25
DK153619C (en)	1988-12-19
KR880000963B1 (en)	1988-06-04
CA1165859A (en)	1984-04-17
IE822516L (en)	1983-04-19
DK153619B (en)	1988-08-01

Legal Events

Date	Code	Title	Description
1992-06-29	PBP	Patent lapsed

Publication	Publication Date	Title
GB2095511B (en)	1985-02-06	Unidirectional electret microphone
DK100382A (en)	1982-09-11	Hearing aid
KR830003662U (en)	1983-12-26	hearing aid
IT1150646B (en)	1986-12-17	HEADSET
NL190568C (en)	1994-04-18	Microphone configuration.
DK448582A (en)	1983-04-14	Hearing aid
IT1194032B (en)	1988-08-31	SPEAKER TRUMPET
FR2494951B1 (en)	1986-04-18	IMPROVED ELECTRET MICROPHONE
KR860000049U (en)	1986-02-10	Stereo microphone
DK595883A (en)	1984-06-25	SPEAKER
DK153619C (en)	1988-12-19	Electret Microphone
DK351382A (en)	1983-02-08	Hearing aid
GB2029161B (en)	1983-01-26	Electret microphone
DK151281A (en)	1981-12-27	Hearing aid
NL182119C (en)	1988-01-04	SPEAKER.
IT8267092A0 (en)	1982-01-28	BASSREFLEX TYPE SOUND SPEAKER
SE438233B (en)	1985-04-01	electret
GB2015299B (en)	1982-05-06	Electret microphone
BE887973A (en)	1981-07-16	ELECTRODYNAMIC SPEAKER
JPS5566199A (en)	1980-05-19	Electret microphone
FR2490913B1 (en)	1985-06-14	ELECTRODYNAMIC SPEAKER
DK6182A (en)	1982-07-10	Hearing aid
ATA21383A (en)	1983-12-15	TELEPHONE MICROPHONE
DK295384D0 (en)	1984-06-15	SPEAKER
DK27783D0 (en)	1983-01-25	SPEAKER