BE381511A - - Google Patents
Info
- Publication number
- BE381511A BE381511A BE381511DA BE381511A BE 381511 A BE381511 A BE 381511A BE 381511D A BE381511D A BE 381511DA BE 381511 A BE381511 A BE 381511A
- Authority
- BE
- Belgium
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
- H04R1/24—Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR715389T | 1930-08-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE381511A true BE381511A (en:Method) |
Family
ID=9088909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE381511D BE381511A (en:Method) | 1930-08-14 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE381511A (en:Method) |
| FR (1) | FR715389A (en:Method) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2897291A (en) * | 1955-12-12 | 1959-07-28 | Burke Ambrose | Sound reproducer |
| DE3002843A1 (de) * | 1980-01-26 | 1981-07-30 | Magnetfabrik Bonn Gmbh Vorm. Gewerkschaft Windhorst, 5300 Bonn | Doppel-ringspalt-magnetsystem fuer dynamische lautsprecher mit unterschiedlichen frequenzbereichen |
-
0
- BE BE381511D patent/BE381511A/xx unknown
-
1930
- 1930-08-14 FR FR715389D patent/FR715389A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR715389A (fr) | 1931-12-02 |