BE506590A - - Google Patents
Info
- Publication number
- BE506590A BE506590A BE506590DA BE506590A BE 506590 A BE506590 A BE 506590A BE 506590D A BE506590D A BE 506590DA BE 506590 A BE506590 A BE 506590A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive loop type
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R11/00—Transducers of moving-armature or moving-core type
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R27/00—Public address systems
- H04R27/02—Amplifying systems for the deaf
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1974849A GB674753A (en) | 1949-07-27 | 1949-07-27 | Improvements relating to sound-reproducing systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE506590A true BE506590A (en) |
Family
ID=10134543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE506590D BE506590A (en) | 1949-07-27 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE506590A (en) |
| DE (1) | DE969603C (en) |
| FR (1) | FR1022470A (en) |
| GB (1) | GB674753A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0296092A2 (en) * | 1987-06-19 | 1988-12-21 | George Geladakis | Arrangement for wireless earphones without batteries and electronic circuits, applicable in audio-systems or audio-visual systems of all kinds |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3255903B1 (en) | 2009-08-03 | 2022-12-07 | IMAX Corporation | Systems and method for monitoring cinema loudspeakers and compensating for quality problems |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB498468A (en) * | 1937-07-05 | 1939-01-05 | Joseph Poliakoff | Improved method of and apparatus for the transmission of speech and other sounds |
-
0
- BE BE506590D patent/BE506590A/xx unknown
-
1949
- 1949-07-27 GB GB1974849A patent/GB674753A/en not_active Expired
-
1950
- 1950-07-25 FR FR1022470D patent/FR1022470A/en not_active Expired
- 1950-08-22 DE DEF2473A patent/DE969603C/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0296092A2 (en) * | 1987-06-19 | 1988-12-21 | George Geladakis | Arrangement for wireless earphones without batteries and electronic circuits, applicable in audio-systems or audio-visual systems of all kinds |
| EP0296092A3 (en) * | 1987-06-19 | 1989-08-16 | George Geladakis | Arrangement for wireless earphones without batteries and electronic circuits, applicable in audio-systems or audio-visual systems of all kinds |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1022470A (en) | 1953-03-05 |
| DE969603C (en) | 1958-06-26 |
| GB674753A (en) | 1952-07-02 |