IN149955B - - Google Patents
Info
- Publication number
- IN149955B IN149955B IN657/CAL/79A IN657CA1979A IN149955B IN 149955 B IN149955 B IN 149955B IN 657CA1979 A IN657CA1979 A IN 657CA1979A IN 149955 B IN149955 B IN 149955B
- Authority
- IN
- India
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
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
-
- 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)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Transducers For Ultrasonic Waves (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19782831377 DE2831377A1 (en) | 1978-07-17 | 1978-07-17 | ELECTROACOUSTIC CONVERTER |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IN149955B true IN149955B (en) | 1982-06-12 |
Family
ID=6044600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IN657/CAL/79A IN149955B (en) | 1978-07-17 | 1979-06-27 |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0007435A1 (en) |
| JP (1) | JPS5516597A (en) |
| AR (1) | AR216250A1 (en) |
| AU (1) | AU4892979A (en) |
| BR (1) | BR7904525A (en) |
| DE (1) | DE2831377A1 (en) |
| GB (1) | GB2025733A (en) |
| IN (1) | IN149955B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3232177A1 (en) * | 1982-08-30 | 1984-03-01 | Siemens AG, 1000 Berlin und 8000 München | PIEZOELECTRIC CONVERTER |
| FR2599207B1 (en) * | 1986-05-23 | 1989-05-26 | Labo Electronique Physique | PIEZOELECTRIC SPEAKER TYPE DEVICE |
| EP1142444B1 (en) * | 1999-01-11 | 2003-10-15 | Siemens Aktiengesellschaft | Passive microphone with wireless transmission |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4217838Y1 (en) * | 1964-09-07 | 1967-10-16 | ||
| JPS4840392A (en) * | 1971-09-25 | 1973-06-13 | ||
| DE2202254C2 (en) * | 1972-01-18 | 1974-01-24 | Siemens Ag | Electroacoustic transducers, in particular microphones for telephone systems |
| US3786202A (en) * | 1972-04-10 | 1974-01-15 | Motorola Inc | Acoustic transducer including piezoelectric driving element |
| DE2223531B1 (en) * | 1972-05-15 | 1973-11-08 | Siemens Ag | ELECTROACOUSTIC CONVERTER |
| JPS4922090A (en) * | 1972-06-17 | 1974-02-27 | ||
| JPS5245439B2 (en) * | 1972-08-31 | 1977-11-16 |
-
1978
- 1978-07-17 DE DE19782831377 patent/DE2831377A1/en not_active Withdrawn
-
1979
- 1979-06-19 EP EP79102026A patent/EP0007435A1/en not_active Withdrawn
- 1979-06-26 AR AR27705579A patent/AR216250A1/en active
- 1979-06-27 IN IN657/CAL/79A patent/IN149955B/en unknown
- 1979-07-11 GB GB7924085A patent/GB2025733A/en not_active Withdrawn
- 1979-07-16 AU AU48929/79A patent/AU4892979A/en not_active Abandoned
- 1979-07-16 JP JP8938579A patent/JPS5516597A/en active Pending
- 1979-07-16 BR BR7904525A patent/BR7904525A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5516597A (en) | 1980-02-05 |
| AR216250A1 (en) | 1979-11-30 |
| EP0007435A1 (en) | 1980-02-06 |
| AU4892979A (en) | 1980-01-24 |
| BR7904525A (en) | 1980-04-08 |
| GB2025733A (en) | 1980-01-23 |
| DE2831377A1 (en) | 1980-01-31 |