NL7313654A - - Google Patents
Info
- Publication number
- NL7313654A NL7313654A NL7313654A NL7313654A NL7313654A NL 7313654 A NL7313654 A NL 7313654A NL 7313654 A NL7313654 A NL 7313654A NL 7313654 A NL7313654 A NL 7313654A NL 7313654 A NL7313654 A NL 7313654A
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G7/00—Capacitors in which the capacitance is varied by non-mechanical means; Processes of their manufacture
- H01G7/02—Electrets, i.e. having a permanently-polarised dielectric
- H01G7/021—Electrets, i.e. having a permanently-polarised dielectric having an organic dielectric
- H01G7/023—Electrets, i.e. having a permanently-polarised dielectric having an organic dielectric of macromolecular compounds
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
- H04R17/005—Piezoelectric transducers; Electrostrictive transducers using a piezoelectric polymer
-
- 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
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4592172A GB1410822A (en) | 1972-10-05 | 1972-10-05 | Electroacoustic arrangements |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL7313654A true NL7313654A (en) | 1974-04-09 |
Family
ID=10439108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL7313654A NL7313654A (en) | 1972-10-05 | 1973-10-04 |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE2261600A1 (en) |
| GB (1) | GB1410822A (en) |
| NL (1) | NL7313654A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4280018A (en) * | 1979-05-14 | 1981-07-21 | Strobotronix, Inc. | Integrated piezoelectric sound transducer and preamplifier |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5562494A (en) * | 1978-11-05 | 1980-05-10 | Ngk Spark Plug Co | Pieozoelectric converter for electric string instrument |
| DE2942641A1 (en) * | 1979-10-22 | 1981-04-30 | Deutsche Itt Industries Gmbh, 7800 Freiburg | Integrated device for insertion into telephone receiver - is substitute carbon microphone and has P-enrichment FET |
| US4486869A (en) * | 1981-02-25 | 1984-12-04 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Underwater acoustic devices |
| GB2176369B (en) * | 1985-05-09 | 1988-10-05 | Plessey Co Plc | Improvements in and relating to microphones |
-
1972
- 1972-10-05 GB GB4592172A patent/GB1410822A/en not_active Expired
- 1972-12-15 DE DE19722261600 patent/DE2261600A1/en active Pending
-
1973
- 1973-10-04 NL NL7313654A patent/NL7313654A/xx unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4280018A (en) * | 1979-05-14 | 1981-07-21 | Strobotronix, Inc. | Integrated piezoelectric sound transducer and preamplifier |
Also Published As
| Publication number | Publication date |
|---|---|
| GB1410822A (en) | 1975-10-22 |
| DE2261600A1 (en) | 1974-04-25 |