NL78413C - - Google Patents
Info
- Publication number
- NL78413C NL78413C NL78413DA NL78413C NL 78413 C NL78413 C NL 78413C NL 78413D A NL78413D A NL 78413DA NL 78413 C NL78413 C NL 78413C
- Authority
- NL
- Netherlands
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
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
- H04R1/2807—Enclosures comprising vibrating or resonating arrangements
- H04R1/2853—Enclosures comprising vibrating or resonating arrangements using an acoustic labyrinth or a transmission line
- H04R1/2857—Enclosures comprising vibrating or resonating arrangements using an acoustic labyrinth or a transmission line for loudspeaker transducers
-
- 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
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
- H04R1/2807—Enclosures comprising vibrating or resonating arrangements
- H04R1/2838—Enclosures comprising vibrating or resonating arrangements of the bandpass type
- H04R1/2842—Enclosures comprising vibrating or resonating arrangements of the bandpass type for loudspeaker transducers
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE683822X | 1949-02-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL78413C true NL78413C (xx) |
Family
ID=3877841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL78413D NL78413C (xx) | 1949-02-14 |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE487335A (xx) |
| FR (1) | FR1012303A (xx) |
| GB (1) | GB683822A (xx) |
| LU (1) | LU29932A1 (xx) |
| NL (1) | NL78413C (xx) |
-
0
- LU LU29932D patent/LU29932A1/xx unknown
- NL NL78413D patent/NL78413C/xx active
- BE BE487335D patent/BE487335A/xx unknown
-
1950
- 1950-02-10 GB GB3448/50A patent/GB683822A/en not_active Expired
- 1950-02-10 FR FR1012303D patent/FR1012303A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1012303A (fr) | 1952-07-08 |
| BE487335A (xx) | |
| GB683822A (en) | 1952-12-03 |
| LU29932A1 (xx) |