DK142340C - - Google Patents
Info
- Publication number
- DK142340C DK142340C DK128378A DK128378A DK142340C DK 142340 C DK142340 C DK 142340C DK 128378 A DK128378 A DK 128378A DK 128378 A DK128378 A DK 128378A DK 142340 C DK142340 C DK 142340C
- Authority
- DK
- Denmark
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 (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7703355A SE398588B (sv) | 1977-03-23 | 1977-03-23 | Temperaturstabil elektretmikrofon |
| SE7703355 | 1977-03-23 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK128378A DK128378A (US06566495-20030520-M00011.png) | 1978-09-24 |
| DK142340B DK142340B (da) | 1980-10-13 |
| DK142340C true DK142340C (US06566495-20030520-M00011.png) | 1981-03-23 |
Family
ID=20330819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK128378AA DK142340B (da) | 1977-03-23 | 1978-03-22 | Temperaturstabil elektretmikrofon. |
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 |
| JP4181580B2 (ja) | 2003-11-20 | 2008-11-19 | 松下電器産業株式会社 | エレクトレット及びエレクトレットコンデンサー |
| WO2005086534A1 (ja) * | 2004-03-03 | 2005-09-15 | Matsushita Electric Industrial Co., Ltd. | エレクトレットコンデンサーマイクロフォンユニット |
| JP4137158B2 (ja) | 2004-03-05 | 2008-08-20 | 松下電器産業株式会社 | エレクトレットコンデンサーマイクロフォン |
| EP2449796A1 (en) | 2009-06-29 | 2012-05-09 | Nokia Corp. | 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 (US06566495-20030520-M00011.png) * | 1971-12-02 | 1973-12-10 | Ericsson Telefon Ab L M | |
| SE7410408L (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 NO NO781052A patent/NO140450C/no unknown
- 1978-03-22 CA CA299,505A patent/CA1084153A/en not_active Expired
- 1978-03-22 ES ES468174A patent/ES468174A1/es not_active Expired
- 1978-03-22 DK DK128378AA patent/DK142340B/da not_active IP Right Cessation
- 1978-03-23 IT IT21534/78A patent/IT1093606B/it active
Also Published As
| Publication number | Publication date |
|---|---|
| DE2810813A1 (de) | 1978-09-28 |
| DK142340B (da) | 1980-10-13 |
| IT7821534A0 (it) | 1978-03-23 |
| SE398588B (sv) | 1977-12-27 |
| FR2385288B1 (US06566495-20030520-M00011.png) | 1984-03-23 |
| NO781052L (no) | 1978-09-26 |
| CH626765A5 (US06566495-20030520-M00011.png) | 1981-11-30 |
| NO140450B (no) | 1979-05-21 |
| US4142073A (en) | 1979-02-27 |
| NL7803009A (nl) | 1978-09-26 |
| FR2385288A1 (fr) | 1978-10-20 |
| AU3425478A (en) | 1979-09-20 |
| DK128378A (US06566495-20030520-M00011.png) | 1978-09-24 |
| GB1575874A (en) | 1980-10-01 |
| NO140450C (no) | 1979-08-29 |
| IT1093606B (it) | 1985-07-19 |
| CA1084153A (en) | 1980-08-19 |
| AU516257B2 (en) | 1981-05-28 |
| ES468174A1 (es) | 1979-01-01 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PBP | Patent lapsed |