CH626765A5 - - Google Patents
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- Publication number
- CH626765A5 CH626765A5 CH305178A CH305178A CH626765A5 CH 626765 A5 CH626765 A5 CH 626765A5 CH 305178 A CH305178 A CH 305178A CH 305178 A CH305178 A CH 305178A CH 626765 A5 CH626765 A5 CH 626765A5
- Authority
- CH
- Switzerland
- Prior art keywords
- plastic film
- polarized
- microphone
- electret
- electret microphone
- Prior art date
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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7703355A SE398588B (sv) | 1977-03-23 | 1977-03-23 | Temperaturstabil elektretmikrofon |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH626765A5 true CH626765A5 (US06312121-20011106-C00033.png) | 1981-11-30 |
Family
ID=20330819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH305178A CH626765A5 (US06312121-20011106-C00033.png) | 1977-03-23 | 1978-03-21 |
Country Status (13)
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4331840A (en) * | 1980-02-22 | 1982-05-25 | Lectret S.A. | Electret transducer with tapered acoustic chamber |
| US4418246A (en) * | 1980-10-29 | 1983-11-29 | Tibbetts Industries, Inc. | Cell assembly for electret transducer |
| US5442595A (en) * | 1994-04-22 | 1995-08-15 | Xecutek Corporation | Capacitance-type ultrasonic transducer |
| DE19703311A1 (de) * | 1997-01-30 | 1998-08-06 | Sennheiser Electronic | Grenzflächenmikrofon |
| DE19715365C2 (de) * | 1997-04-11 | 1999-03-25 | Sennheiser Electronic | Kondensatormikrofon |
| US6741709B2 (en) * | 2000-12-20 | 2004-05-25 | Shure Incorporated | Condenser microphone assembly |
| US7062058B2 (en) * | 2001-04-18 | 2006-06-13 | Sonion Nederland B.V. | Cylindrical microphone having an electret assembly in the end cover |
| US7620192B2 (en) | 2003-11-20 | 2009-11-17 | Panasonic Corporation | Electret covered with an insulated film and an electret condenser having the electret |
| US7706554B2 (en) * | 2004-03-03 | 2010-04-27 | Panasonic Corporation | Electret condenser |
| KR20060129041A (ko) | 2004-03-05 | 2006-12-14 | 마츠시타 덴끼 산교 가부시키가이샤 | 일렉트릿 컨덴서 |
| US9247331B2 (en) | 2009-06-29 | 2016-01-26 | Nokia Technologoies Oy | Temperature compensated microphone |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3328653A (en) * | 1966-09-22 | 1967-06-27 | Budd Co | Thin film pressure transducer |
| USRE28420E (en) * | 1967-05-15 | 1975-05-13 | Blbctret acoustic transducer | |
| US3821490A (en) * | 1970-10-09 | 1974-06-28 | Chester C Pond | Electroacoustic transducer especially electrostatic speakers and systems |
| SE362571B (US06312121-20011106-C00033.png) * | 1971-12-02 | 1973-12-10 | Ericsson Telefon Ab L M | |
| SE382297B (sv) * | 1974-08-15 | 1976-01-19 | Ericsson Telefon Ab L M | Forfarande for framstellning av en elektretmikrofon med ett noggrant bestemt luftgap. |
| US4070741A (en) * | 1976-09-27 | 1978-01-31 | Genrad Inc. | Method of making an electret acoustic transducer |
| US4063050A (en) * | 1976-12-30 | 1977-12-13 | Industrial Research Products, Inc. | Acoustic transducer with improved electret assembly |
-
1977
- 1977-03-23 SE SE7703355A patent/SE398588B/xx unknown
-
1978
- 1978-03-06 US US05/883,693 patent/US4142073A/en not_active Expired - Lifetime
- 1978-03-13 DE DE19782810813 patent/DE2810813A1/de not_active Ceased
- 1978-03-16 GB GB10530/78A patent/GB1575874A/en not_active Expired
- 1978-03-17 FR FR7807902A patent/FR2385288A1/fr active Granted
- 1978-03-17 AU AU34254/78A patent/AU516257B2/en not_active Expired
- 1978-03-20 NL NL7803009A patent/NL7803009A/xx not_active Application Discontinuation
- 1978-03-21 CH CH305178A patent/CH626765A5/de not_active IP Right Cessation
- 1978-03-22 DK DK128378AA patent/DK142340B/da not_active IP Right Cessation
- 1978-03-22 NO NO781052A patent/NO140450C/no unknown
- 1978-03-22 ES ES468174A patent/ES468174A1/es not_active Expired
- 1978-03-22 CA CA299,505A patent/CA1084153A/en not_active Expired
- 1978-03-23 IT IT21534/78A patent/IT1093606B/it active
Also Published As
| Publication number | Publication date |
|---|---|
| AU516257B2 (en) | 1981-05-28 |
| AU3425478A (en) | 1979-09-20 |
| DK128378A (US06312121-20011106-C00033.png) | 1978-09-24 |
| NL7803009A (nl) | 1978-09-26 |
| DE2810813A1 (de) | 1978-09-28 |
| ES468174A1 (es) | 1979-01-01 |
| DK142340B (da) | 1980-10-13 |
| FR2385288B1 (US06312121-20011106-C00033.png) | 1984-03-23 |
| CA1084153A (en) | 1980-08-19 |
| IT7821534A0 (it) | 1978-03-23 |
| NO781052L (no) | 1978-09-26 |
| DK142340C (US06312121-20011106-C00033.png) | 1981-03-23 |
| FR2385288A1 (fr) | 1978-10-20 |
| IT1093606B (it) | 1985-07-19 |
| SE398588B (sv) | 1977-12-27 |
| GB1575874A (en) | 1980-10-01 |
| NO140450C (no) | 1979-08-29 |
| US4142073A (en) | 1979-02-27 |
| NO140450B (no) | 1979-05-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased |