GR70029B - - Google Patents
Info
- Publication number
- GR70029B GR70029B GR62906A GR800162906A GR70029B GR 70029 B GR70029 B GR 70029B GR 62906 A GR62906 A GR 62906A GR 800162906 A GR800162906 A GR 800162906A GR 70029 B GR70029 B GR 70029B
- Authority
- GR
- Greece
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
- 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
- H04R1/225—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only for telephonic receivers
-
- 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
- H04R17/10—Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
- H04R2499/10—General applications
- H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19792937922 DE2937922A1 (en) | 1979-09-19 | 1979-09-19 | PIEZOELECTRIC CONVERTER |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GR70029B true GR70029B (en) | 1982-07-23 |
Family
ID=6081296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GR62906A GR70029B (en) | 1979-09-19 | 1980-09-17 |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP0025955B1 (en) |
| JP (1) | JPS5651200A (en) |
| AR (1) | AR223549A1 (en) |
| AT (1) | ATE11478T1 (en) |
| AU (1) | AU538420B2 (en) |
| BR (1) | BR8005981A (en) |
| DE (1) | DE2937922A1 (en) |
| FI (1) | FI74183C (en) |
| GR (1) | GR70029B (en) |
| ZA (1) | ZA805775B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3131349C2 (en) * | 1981-08-07 | 1983-05-11 | Rosenthal Technik Ag, 8672 Selb | Piezoelectric three-tone generator |
| US4413198A (en) * | 1981-12-30 | 1983-11-01 | Motorola, Inc. | Piezoelectric transducer apparatus |
| DE3446183A1 (en) * | 1984-12-18 | 1986-06-26 | Siemens AG, 1000 Berlin und 8000 München | Piezo-electric transducer |
| JPS6295399U (en) * | 1985-12-03 | 1987-06-18 | ||
| AU588989B2 (en) * | 1986-04-10 | 1989-09-28 | Alcatel Australia Limited | An improved transducer |
| DE4311701C2 (en) * | 1993-04-08 | 1999-08-26 | Siemens Ag | Arrangement for generating acoustic signals, in particular tone calls in telecommunication devices |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB202938A (en) * | 1922-02-06 | 1923-08-07 | Signal Gmbh | Improvements in acoustic apparatus |
| DE2119911B2 (en) * | 1971-04-23 | 1973-11-15 | Siemens Ag, 1000 Berlin U. 8000 Muenchen | Electroacoustic converter, in particular microphone for telephone systems |
| BE759888A (en) * | 1969-12-05 | 1971-06-04 | Siemens Ag | ELECTRO-ACOUSTIC TRANSDUCER, ESPECIALLY MICROPHONE FOR TELEPHONE SYSTEMS |
| GB1370164A (en) * | 1972-01-30 | 1974-10-16 | Mullard Ltd | Piezoelectric transducer |
| DE2223531B1 (en) * | 1972-05-15 | 1973-11-08 | Siemens Ag | ELECTROACOUSTIC CONVERTER |
| US4006371A (en) * | 1973-03-19 | 1977-02-01 | Whitewater Electronics, Inc. | Electroacoustical transducer comprising piezoelectric element |
| US4056741A (en) * | 1973-04-18 | 1977-11-01 | Airco, Inc. | Audible signal generating apparatus having selectively controlled audible output |
| US3922672A (en) * | 1974-03-04 | 1975-11-25 | Mallory & Co Inc P R | Audible alarm device |
| JPS5330296A (en) * | 1976-09-01 | 1978-03-22 | Seiko Instr & Electronics Ltd | Electro-acoustic transducer |
-
1979
- 1979-09-19 DE DE19792937922 patent/DE2937922A1/en active Granted
-
1980
- 1980-09-11 AR AR282490A patent/AR223549A1/en active
- 1980-09-12 AT AT80105477T patent/ATE11478T1/en not_active IP Right Cessation
- 1980-09-12 EP EP80105477A patent/EP0025955B1/en not_active Expired
- 1980-09-17 JP JP12806380A patent/JPS5651200A/en active Pending
- 1980-09-17 GR GR62906A patent/GR70029B/el unknown
- 1980-09-18 AU AU62509/80A patent/AU538420B2/en not_active Ceased
- 1980-09-18 BR BR8005981A patent/BR8005981A/en unknown
- 1980-09-18 ZA ZA00805775A patent/ZA805775B/en unknown
- 1980-09-18 FI FI802943A patent/FI74183C/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| AU6250980A (en) | 1981-04-09 |
| AR223549A1 (en) | 1981-08-31 |
| FI74183B (en) | 1987-08-31 |
| FI802943A (en) | 1981-03-20 |
| BR8005981A (en) | 1981-03-31 |
| JPS5651200A (en) | 1981-05-08 |
| FI74183C (en) | 1987-12-10 |
| ZA805775B (en) | 1981-09-30 |
| AU538420B2 (en) | 1984-08-16 |
| DE2937922A1 (en) | 1981-04-09 |
| EP0025955B1 (en) | 1985-01-23 |
| EP0025955A1 (en) | 1981-04-01 |
| DE2937922C2 (en) | 1988-11-24 |
| ATE11478T1 (en) | 1985-02-15 |