BE381693A - - Google Patents
Info
- Publication number
- BE381693A BE381693A BE381693DA BE381693A BE 381693 A BE381693 A BE 381693A BE 381693D A BE381693D A BE 381693DA BE 381693 A BE381693 A BE 381693A
- Authority
- BE
- Belgium
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
- H04R21/00—Variable-resistance transducers
- H04R21/02—Microphones
- H04R21/021—Microphones with granular resistance material
-
- 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
- H04R1/14—Throat mountings for microphones
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 |
|---|---|---|---|
| BE740836X | 1931-07-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE381693A true BE381693A (en:Method) |
Family
ID=3879441
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE381693D BE381693A (en:Method) | 1931-07-30 | ||
| BE384854D BE384854A (en:Method) | 1931-07-30 | ||
| BE386567D BE386567A (en:Method) | 1931-07-30 |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE384854D BE384854A (en:Method) | 1931-07-30 | ||
| BE386567D BE386567A (en:Method) | 1931-07-30 |
Country Status (2)
| Country | Link |
|---|---|
| BE (3) | BE386567A (en:Method) |
| FR (1) | FR740836A (en:Method) |
-
0
- BE BE381693D patent/BE381693A/xx unknown
- BE BE384854D patent/BE384854A/xx unknown
- BE BE386567D patent/BE386567A/xx unknown
-
1932
- 1932-07-29 FR FR740836D patent/FR740836A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE386567A (en:Method) | |
| BE384854A (en:Method) | |
| FR740836A (fr) | 1933-02-01 |