FR2251976B1 - - Google Patents
Info
- Publication number
- FR2251976B1 FR2251976B1 FR7437603A FR7437603A FR2251976B1 FR 2251976 B1 FR2251976 B1 FR 2251976B1 FR 7437603 A FR7437603 A FR 7437603A FR 7437603 A FR7437603 A FR 7437603A FR 2251976 B1 FR2251976 B1 FR 2251976B1
- 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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/44—Special adaptations for subaqueous use, e.g. for hydrophone
-
- 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
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
- H04R1/021—Casings; Cabinets ; Supports therefor; Mountings therein incorporating only one transducer
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Electromechanical Clocks (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1616973A CH566696A5 (it) | 1973-11-16 | 1973-11-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2251976A1 FR2251976A1 (en) | 1975-06-13 |
| FR2251976B1 true FR2251976B1 (it) | 1978-10-27 |
Family
ID=4414999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7437603A Granted FR2251976A1 (en) | 1973-11-16 | 1974-11-14 | Sealed electro-acoustic transducer - has membrane equalising internal and external pressures |
Country Status (3)
| Country | Link |
|---|---|
| AT (1) | AT325695B (it) |
| CH (1) | CH566696A5 (it) |
| FR (1) | FR2251976A1 (it) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2428950A1 (fr) * | 1978-06-15 | 1980-01-11 | Andrieu Michel | Systeme de reproduction sonore resistant aux deflagrations |
| DE19732184C1 (de) * | 1997-07-26 | 1999-01-07 | Nokia Deutschland Gmbh | Lautsprecherbox |
| US6412594B1 (en) | 1999-10-05 | 2002-07-02 | Shoot The Moon Products Ii, Llc | Water gun with sound effects module |
| EP1335175A1 (en) * | 2002-02-07 | 2003-08-13 | Shoot the Moon Products II, L.L.C. | Water gun with sound effect module |
| DE102019002654B4 (de) | 2019-04-11 | 2023-02-16 | Paragon Gmbh & Co. Kgaa | "Lautsprecher für Kraftfahrzeuge" |
| CN111822314B (zh) * | 2020-08-12 | 2024-01-09 | 湖南大学 | 一种基于气体弹簧的电磁吸力式水声换能器及控制方法 |
-
1973
- 1973-11-16 CH CH1616973A patent/CH566696A5/xx not_active IP Right Cessation
-
1974
- 1974-06-28 AT AT536274A patent/AT325695B/de not_active IP Right Cessation
- 1974-11-14 FR FR7437603A patent/FR2251976A1/fr active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| ATA536274A (de) | 1975-01-15 |
| CH566696A5 (it) | 1975-09-15 |
| AT325695B (de) | 1975-11-10 |
| FR2251976A1 (en) | 1975-06-13 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |