FR2448272B3 - - Google Patents
Info
- Publication number
- FR2448272B3 FR2448272B3 FR7902559A FR7902559A FR2448272B3 FR 2448272 B3 FR2448272 B3 FR 2448272B3 FR 7902559 A FR7902559 A FR 7902559A FR 7902559 A FR7902559 A FR 7902559A FR 2448272 B3 FR2448272 B3 FR 2448272B3
- Authority
- FR
- France
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
-
- 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
- H04R1/2815—Enclosures comprising vibrating or resonating arrangements of the bass reflex type
- H04R1/2819—Enclosures comprising vibrating or resonating arrangements of the bass reflex type 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
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
- H04R3/14—Cross-over networks
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL7900066A NL7900066A (nl) | 1979-01-05 | 1979-01-05 | Luidsprekerinrichting met verbeterde lage-tonenluid- sprekerefficieentie. |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2448272A1 FR2448272A1 (fr) | 1980-08-29 |
FR2448272B3 true FR2448272B3 (US07534539-20090519-C00127.png) | 1981-10-16 |
Family
ID=19832399
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7902559A Granted FR2448272A1 (fr) | 1979-01-05 | 1979-01-31 | Systeme de haut-parleurs a haut rendement |
Country Status (4)
Country | Link |
---|---|
CA (1) | CA1110176A (US07534539-20090519-C00127.png) |
DE (1) | DE2901021A1 (US07534539-20090519-C00127.png) |
FR (1) | FR2448272A1 (US07534539-20090519-C00127.png) |
NL (1) | NL7900066A (US07534539-20090519-C00127.png) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL8501719A (nl) * | 1985-06-14 | 1987-01-02 | Philips Nv | Basreflex luidsprekersysteem. |
CN103686555B (zh) * | 2013-11-19 | 2017-01-11 | 歌尔股份有限公司 | 微型扬声器模组和增强其频率响应的方法以及电子设备 |
-
1979
- 1979-01-05 NL NL7900066A patent/NL7900066A/nl not_active Application Discontinuation
- 1979-01-12 DE DE19792901021 patent/DE2901021A1/de not_active Withdrawn
- 1979-01-31 FR FR7902559A patent/FR2448272A1/fr active Granted
- 1979-02-06 CA CA320,911A patent/CA1110176A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
NL7900066A (nl) | 1980-07-08 |
FR2448272A1 (fr) | 1980-08-29 |
CA1110176A (en) | 1981-10-06 |
DE2901021A1 (de) | 1980-07-24 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |