BE522584A - - Google Patents
Info
- Publication number
- BE522584A BE522584A BE522584DA BE522584A BE 522584 A BE522584 A BE 522584A BE 522584D A BE522584D A BE 522584DA BE 522584 A BE522584 A BE 522584A
- 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
- H04R1/30—Combinations of transducers with horns, e.g. with mechanical matching means, i.e. front-loaded horns
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- 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
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1068838T | 1952-09-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE522584A true BE522584A (de) |
Family
ID=9603926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE522584D BE522584A (de) | 1952-09-11 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE522584A (de) |
| FR (2) | FR1068838A (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH551124A (it) * | 1971-06-09 | 1974-06-28 | Cesati Mario | Altoparlante a tromba. |
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0
- BE BE522584D patent/BE522584A/xx unknown
-
1952
- 1952-09-11 FR FR1068838D patent/FR1068838A/fr not_active Expired
- 1952-10-14 FR FR63401D patent/FR63401E/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR63401E (fr) | 1955-09-13 |
| FR1068838A (fr) | 1954-07-01 |