BE357449A - - Google Patents
Info
- Publication number
- BE357449A BE357449A BE357449DA BE357449A BE 357449 A BE357449 A BE 357449A BE 357449D A BE357449D A BE 357449DA BE 357449 A BE357449 A BE 357449A
- 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)
- Details Of Audible-Bandwidth Transducers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR304313X | 1928-01-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE357449A true BE357449A (de) |
Family
ID=8888782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE357449D BE357449A (de) | 1928-01-20 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US1962300A (de) |
| BE (1) | BE357449A (de) |
| GB (1) | GB304313A (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2878887A (en) * | 1955-11-29 | 1959-03-24 | Wisconsin Alumni Res Found | Acoustical device |
| GB2239570A (en) * | 1989-12-20 | 1991-07-03 | * Wild Michael | Bath tub radio |
| NL1019961C2 (nl) * | 2002-02-14 | 2003-08-15 | Duran Audio B V | Akoestische weergever. |
-
0
- BE BE357449D patent/BE357449A/xx unknown
-
1928
- 1928-12-31 GB GB38564/28A patent/GB304313A/en not_active Expired
-
1929
- 1929-01-14 US US332479A patent/US1962300A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US1962300A (en) | 1934-06-12 |
| GB304313A (en) | 1930-06-30 |