BE425729A - - Google Patents
Info
- Publication number
- BE425729A BE425729A BE425729DA BE425729A BE 425729 A BE425729 A BE 425729A BE 425729D A BE425729D A BE 425729DA BE 425729 A BE425729 A BE 425729A
- 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
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
- H04R1/345—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers
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 |
|---|---|---|---|
| NL831978X | 1937-01-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE425729A true BE425729A (en:Method) |
Family
ID=19842989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE425729D BE425729A (en:Method) | 1937-01-14 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE425729A (en:Method) |
| FR (1) | FR831978A (en:Method) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2909880C2 (de) | 1979-03-14 | 1984-09-20 | DUAL Gebrüder Steidinger GmbH & Co, 7742 St Georgen | Elektrodynamischer Lautsprecher |
| DE3006508C2 (de) * | 1980-02-21 | 1983-06-23 | DUAL Gebrüder Steidinger GmbH & Co, 7742 St Georgen | Elektrodynamischer Lautsprecher |
-
0
- BE BE425729D patent/BE425729A/xx unknown
-
1938
- 1938-01-12 FR FR831978D patent/FR831978A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR831978A (fr) | 1938-09-16 |