BE366478A - - Google Patents
Info
- Publication number
- BE366478A BE366478A BE366478DA BE366478A BE 366478 A BE366478 A BE 366478A BE 366478D A BE366478D A BE 366478DA BE 366478 A BE366478 A BE 366478A
- 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)
- Diaphragms For Electromechanical Transducers (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL339127X | 1929-07-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE366478A true BE366478A (US06262066-20010717-C00315.png) |
Family
ID=19784637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE366478D BE366478A (US06262066-20010717-C00315.png) | 1929-07-26 |
Country Status (5)
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2567829A (en) * | 1947-03-06 | 1951-09-11 | Suthann Robert Andree | Combined cabinet and chassis for mounting electrical components |
| US8631897B2 (en) | 2008-06-27 | 2014-01-21 | Rgb Systems, Inc. | Ceiling loudspeaker system |
| DE102008058028A1 (de) * | 2008-11-18 | 2010-05-20 | K+H Vertriebs- Und Entwicklungsgesellschaft Mbh | Lautsprechereinheit |
| EP2721837A4 (en) * | 2011-06-14 | 2014-10-01 | Rgb Systems Inc | CEILING SPEAKER SYSTEM |
| US11277684B2 (en) * | 2019-01-17 | 2022-03-15 | Onkyo Corporation | Diffuser |
-
0
- BE BE366478D patent/BE366478A/xx unknown
-
1929
- 1929-12-05 DE DED59859D patent/DE588742C/de not_active Expired
- 1929-12-17 FR FR686786D patent/FR686786A/fr not_active Expired
- 1929-12-17 GB GB38658/29A patent/GB339127A/en not_active Expired
- 1929-12-26 US US416662A patent/US1952539A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US1952539A (en) | 1934-03-27 |
| DE588742C (de) | 1933-11-25 |
| FR686786A (fr) | 1930-07-30 |
| GB339127A (en) | 1930-12-04 |
