BE414489A - - Google Patents
Info
- Publication number
- BE414489A BE414489A BE414489DA BE414489A BE 414489 A BE414489 A BE 414489A BE 414489D A BE414489D A BE 414489DA BE 414489 A BE414489 A BE 414489A
- 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)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
- Building Environments (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12551A US2020166A (en) | 1935-03-23 | 1935-03-23 | Sound reproducing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE414489A true BE414489A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
Family
ID=21755497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE414489D BE414489A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1935-03-23 |
Country Status (7)
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE970228C (de) * | 1937-08-25 | 1958-08-28 | Ing Karl Nowak | Schallstrahler mit raeumlich wirkender Wiedergabe |
| US2423045A (en) * | 1943-09-04 | 1947-06-24 | Kellogg M W Co | Liquid phase catalytic reactions of hydrocarbons |
| US2888090A (en) * | 1949-10-14 | 1959-05-26 | Telefunken Gmbh | Loudspeaker arrangement |
| US2816619A (en) * | 1951-12-04 | 1957-12-17 | John E Karlson | Acoustic transducers |
| US2787332A (en) * | 1952-09-06 | 1957-04-02 | Norman C Fulmer | Loud-speaker system |
| DE1098542B (de) * | 1954-09-18 | 1961-02-02 | Dr Emil Podszus | Lautsprecher aus mehreren Elementen |
| GB793193A (en) * | 1955-02-17 | 1958-04-09 | Pye Ltd | An improved acoustic enclosure for loudspeakers |
| US2858899A (en) * | 1956-07-03 | 1958-11-04 | Lopez-Henriquez Miguel | High fidelity speaker enclosure system |
| GB829214A (en) * | 1957-01-11 | 1960-03-02 | Douglas Arthur Lyons | Improvements in loud speaker systems |
| WO1988004514A1 (en) * | 1986-12-02 | 1988-06-16 | Wolfgang Spors | Loudspeaker installation |
| GR1000561B (el) * | 1988-06-01 | 1992-08-26 | Wolfgang Spors | Διαταξη μεγαφωνων. |
| USD772810S1 (en) * | 2013-11-08 | 2016-11-29 | Rusty Chisel, LLC | Radio charging station |
-
0
- NL NL44803D patent/NL44803C/xx active
- BE BE414489D patent/BE414489A/xx unknown
-
1935
- 1935-03-23 US US12551A patent/US2020166A/en not_active Expired - Lifetime
- 1935-12-23 GB GB35579/35A patent/GB459003A/en not_active Expired
-
1936
- 1936-03-19 AT AT149923D patent/AT149923B/de active
- 1936-03-19 CH CH191887D patent/CH191887A/de unknown
- 1936-03-21 FR FR804770D patent/FR804770A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| AT149923B (de) | 1937-06-10 |
| US2020166A (en) | 1935-11-05 |
| CH191887A (de) | 1937-07-15 |
| NL44803C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | |
| FR804770A (fr) | 1936-11-02 |
| GB459003A (en) | 1936-12-31 |