BE447229A - - Google Patents
Info
- Publication number
- BE447229A BE447229A BE447229DA BE447229A BE 447229 A BE447229 A BE 447229A BE 447229D A BE447229D A BE 447229DA BE 447229 A BE447229 A BE 447229A
- 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
- H04R21/00—Variable-resistance transducers
- H04R21/02—Microphones
- H04R21/028—Microphones with a fluid as resistance material
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR977486T | 1942-07-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE447229A true BE447229A (fr) |
Family
ID=9519743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE447229D BE447229A (fr) | 1942-07-20 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE447229A (fr) |
| FR (1) | FR977486A (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000027166A2 (fr) * | 1998-11-02 | 2000-05-11 | Sarnoff Corporation | Conception de transducteurs pour protheses auditives et autres dispositifs |
-
0
- BE BE447229D patent/BE447229A/xx unknown
-
1942
- 1942-07-20 FR FR977486D patent/FR977486A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR977486A (fr) | 1951-04-02 |