NL49661C - - Google Patents
Info
- Publication number
- NL49661C NL49661C NL49661DA NL49661C NL 49661 C NL49661 C NL 49661C NL 49661D A NL49661D A NL 49661DA NL 49661 C NL49661 C NL 49661C
- Authority
- NL
- Netherlands
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
- H04R1/28—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
- H04R1/2815—Enclosures comprising vibrating or resonating arrangements of the bass reflex type
- H04R1/2823—Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material
- H04R1/2826—Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material for loudspeaker transducers
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)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR822383T | 1936-09-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL49661C true NL49661C (https=) |
Family
ID=9280867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL49661D NL49661C (https=) | 1936-09-02 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE423380A (https=) |
| FR (1) | FR822383A (https=) |
| GB (1) | GB489588A (https=) |
| NL (1) | NL49661C (https=) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB793193A (en) * | 1955-02-17 | 1958-04-09 | Pye Ltd | An improved acoustic enclosure for loudspeakers |
| US3283848A (en) * | 1965-10-21 | 1966-11-08 | Patti Thomas Allan | Sound reproduction system |
| DE3923740C1 (https=) * | 1989-07-18 | 1990-12-06 | Messerschmitt-Boelkow-Blohm Gmbh, 8012 Ottobrunn, De | |
| JP2784830B2 (ja) * | 1989-09-04 | 1998-08-06 | ソニー株式会社 | ヘッドフォン |
| FR2753872B1 (fr) * | 1996-09-25 | 2004-08-06 | Master | Enceinte acoustique destinee plus particulierement a des hauts-parleurs de puissance pour les basses frequences |
| FR2824990B1 (fr) | 2001-05-15 | 2003-09-26 | Jean Pierre Morkerken | Emetteur de son et haut-parleur |
| MY170371A (en) | 2013-03-22 | 2019-07-24 | Campobello Ltd | Acoustic device |
-
0
- NL NL49661D patent/NL49661C/xx active
- BE BE423380D patent/BE423380A/xx unknown
-
1936
- 1936-09-02 FR FR822383D patent/FR822383A/fr not_active Expired
-
1937
- 1937-07-30 GB GB21186/37A patent/GB489588A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB489588A (en) | 1938-07-29 |
| BE423380A (https=) | |
| FR822383A (fr) | 1937-12-29 |