GB1352407A - Electrostatic electroacoustic transducer - Google Patents
Electrostatic electroacoustic transducerInfo
- Publication number
- GB1352407A GB1352407A GB3313871A GB3313871A GB1352407A GB 1352407 A GB1352407 A GB 1352407A GB 3313871 A GB3313871 A GB 3313871A GB 3313871 A GB3313871 A GB 3313871A GB 1352407 A GB1352407 A GB 1352407A
- Authority
- GB
- United Kingdom
- Prior art keywords
- films
- electrodes
- film
- conductive
- july
- 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
Links
- 239000004698 Polyethylene Substances 0.000 abstract 1
- 239000000470 constituent Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- -1 polyethylene Polymers 0.000 abstract 1
- 229920000573 polyethylene Polymers 0.000 abstract 1
- 229920002635 polyurethane Polymers 0.000 abstract 1
- 239000004814 polyurethane Substances 0.000 abstract 1
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
- H04R19/013—Electrostatic transducers characterised by the use of electrets for loudspeakers
-
- 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
- H04R19/02—Loudspeakers
-
- 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
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/24—Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges
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)
Abstract
1352407 Audio transducers PIONEER ELECTRONIC CORP 14 July 1971 [14 July 1970] 33138/71 Heading H4J An electrostatic electroacoustic transducer includes at least one fixed electrode and at least two vibratory film electrodes arranged to vibrate in different frequency ranges. The preferred form (as shown expanded) comprises two fixed electrodes each comprised by an electret disc 13, 16 surrounded by a polyethylene or polyurethane gasket 12, 17 and backed by a conductive plate 11, 18. Between the fixed electrodes are two frames 14, 15 carrying on their adjacent faces vibratory films 141, 151 forming the moving electrodes. The film 141 is 5 to 15 microns thick and is held under low tension so as to have a low natural vibration frequency while the film 151 is from one to ten microns thick and under higher tension to have a higher natural frequency of vibration. The films are conductive or have their surfaces rendered conductive. Various materials for the films and constituents of the fixed electrodes are given. The transducer is particularly suitable for use in headphones.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1970069759U JPS4912598Y1 (en) | 1970-07-14 | 1970-07-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1352407A true GB1352407A (en) | 1974-05-08 |
Family
ID=13412034
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3313871A Expired GB1352407A (en) | 1970-07-14 | 1971-07-14 | Electrostatic electroacoustic transducer |
Country Status (6)
Country | Link |
---|---|
US (1) | US3821492A (en) |
JP (1) | JPS4912598Y1 (en) |
CA (1) | CA953017A (en) |
DE (1) | DE2134706B2 (en) |
FR (1) | FR2100906B1 (en) |
GB (1) | GB1352407A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2145301A (en) * | 1983-08-19 | 1985-03-20 | Lectret Sa | An acoustic transducer and a method for making it |
TWI483623B (en) * | 2012-09-14 | 2015-05-01 | Fortune Grand Technology Inc | Speaker unit |
CN106028228A (en) * | 2016-07-25 | 2016-10-12 | 山东共达电声股份有限公司 | Vibrating diaphragm and sound equipment provided with same |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA989514A (en) * | 1972-09-08 | 1976-05-18 | Loh-Yi Chang | Electromechanical transducer and method of making same |
US3980838A (en) * | 1974-02-20 | 1976-09-14 | Tokyo Shibaura Electric Co., Ltd. | Plural electret electroacoustic transducer |
US3894243A (en) * | 1974-06-06 | 1975-07-08 | Us Navy | Polymeric transducer array |
US3970862A (en) * | 1974-06-25 | 1976-07-20 | The United States Of America As Represented By The Secretary Of The Navy | Polymeric sensor of vibration and dynamic pressure |
CA1025994A (en) * | 1975-07-08 | 1978-02-07 | Uniroyal Ltd. | Electromechanical transducer |
US4379951A (en) * | 1977-04-20 | 1983-04-12 | Gabr Saad Z M | Electro-acoustic transducer means |
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. |
US4207442A (en) * | 1978-05-15 | 1980-06-10 | Freeman Miller L | Driver circuit for electrostatic transducers |
DE3003178C2 (en) * | 1980-01-30 | 1983-08-04 | Sennheiser Electronic Kg, 3002 Wedemark | Electroacoustic converter based on the electrostatic principle |
CH642504A5 (en) * | 1981-06-01 | 1984-04-13 | Asulab Sa | Hybrid electroacoustic transducer |
US4872148A (en) * | 1984-03-08 | 1989-10-03 | Polaroid Corporation | Ultrasonic transducer for use in a corrosive/abrasive environment |
US5054081B1 (en) * | 1985-04-02 | 1994-06-28 | Roger A West | Electrostatic transducer with improved bass response utilizing distributed bass resonance energy |
CA1284837C (en) * | 1987-06-18 | 1991-06-11 | Highwood Audio Inc. | Audio transducer |
ATE355719T1 (en) * | 1993-11-14 | 2006-03-15 | Florian Meinhard Koenig | MULTI-CHANNEL HEADPHONES WITH CONTROLLED RADIATION CHARACTERISTICS |
US20060082158A1 (en) * | 2004-10-15 | 2006-04-20 | Schrader Jeffrey L | Method and device for supplying power from acoustic energy |
TWM344699U (en) * | 2008-05-08 | 2008-11-11 | Jetvox Acoustic Corp | Dual band coaxial earphone |
US8855350B2 (en) * | 2009-04-28 | 2014-10-07 | Cochlear Limited | Patterned implantable electret microphone |
EP2553944A4 (en) * | 2010-03-30 | 2016-03-23 | Cochlear Ltd | Low noise electret microphone |
USD1000422S1 (en) * | 2021-04-14 | 2023-10-03 | Crestron Electronics, Inc. | Loudspeaker grille |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR34837E (en) * | 1927-10-21 | |||
DE494221C (en) * | 1926-06-05 | 1930-03-20 | Vogt Hans | Device for converting acoustic vibrations into electrical and vice versa by means of electrostatic fields |
-
1970
- 1970-07-14 JP JP1970069759U patent/JPS4912598Y1/ja not_active Expired
-
1971
- 1971-07-12 DE DE2134706A patent/DE2134706B2/en not_active Ceased
- 1971-07-13 CA CA118,040A patent/CA953017A/en not_active Expired
- 1971-07-13 FR FR7125768A patent/FR2100906B1/fr not_active Expired
- 1971-07-14 GB GB3313871A patent/GB1352407A/en not_active Expired
-
1973
- 1973-06-26 US US00373816A patent/US3821492A/en not_active Expired - Lifetime
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2145301A (en) * | 1983-08-19 | 1985-03-20 | Lectret Sa | An acoustic transducer and a method for making it |
TWI483623B (en) * | 2012-09-14 | 2015-05-01 | Fortune Grand Technology Inc | Speaker unit |
CN106028228A (en) * | 2016-07-25 | 2016-10-12 | 山东共达电声股份有限公司 | Vibrating diaphragm and sound equipment provided with same |
CN106028228B (en) * | 2016-07-25 | 2021-06-11 | 山东共达电声股份有限公司 | Vibrating diaphragm and sound equipment with same |
Also Published As
Publication number | Publication date |
---|---|
US3821492A (en) | 1974-06-28 |
DE2134706A1 (en) | 1972-01-20 |
CA953017A (en) | 1974-08-13 |
JPS4912598Y1 (en) | 1974-03-28 |
DE2134706B2 (en) | 1974-04-18 |
FR2100906A1 (en) | 1972-03-24 |
FR2100906B1 (en) | 1975-10-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |