BE382496A - - Google Patents
Info
- Publication number
- BE382496A BE382496A BE382496DA BE382496A BE 382496 A BE382496 A BE 382496A BE 382496D A BE382496D A BE 382496DA BE 382496 A BE382496 A BE 382496A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US480174A US1877992A (en) | 1930-09-06 | 1930-09-06 | Energy-translating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE382496A true BE382496A (ja�@�@) |
Family
ID=23906943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE382496D BE382496A (ja�@�@) | 1930-09-06 |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US1877992A (ja�@�@) |
| BE (1) | BE382496A (ja�@�@) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2632055A (en) * | 1949-04-18 | 1953-03-17 | John E Parker | Loud speaker system |
-
0
- BE BE382496D patent/BE382496A/xx unknown
-
1930
- 1930-09-06 US US480174A patent/US1877992A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US1877992A (en) | 1932-09-20 |