BE345858A - - Google Patents
Info
- Publication number
- BE345858A BE345858A BE345858DA BE345858A BE 345858 A BE345858 A BE 345858A BE 345858D A BE345858D A BE 345858DA BE 345858 A BE345858 A BE 345858A
- 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
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 |
|---|---|---|---|
| DE642446X | 1926-10-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE345858A true BE345858A (en:Method) |
Family
ID=6580253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE345858D BE345858A (en:Method) | 1926-10-22 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE345858A (en:Method) |
| FR (1) | FR642446A (en:Method) |
-
0
- BE BE345858D patent/BE345858A/xx unknown
-
1927
- 1927-10-15 FR FR642446D patent/FR642446A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR642446A (fr) | 1928-08-28 |