BE464238A - - Google Patents
Info
- Publication number
- BE464238A BE464238A BE464238DA BE464238A BE 464238 A BE464238 A BE 464238A BE 464238D A BE464238D A BE 464238DA BE 464238 A BE464238 A BE 464238A
- 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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/08—Mouthpieces; Microphones; Attachments therefor
- H04R1/083—Special constructions of mouthpieces
-
- 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)
- Measuring Fluid Pressure (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH245546T | 1945-04-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE464238A true BE464238A (https=) |
Family
ID=4464971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE464238D BE464238A (https=) | 1945-04-21 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE464238A (https=) |
| CH (1) | CH245546A (https=) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE506348A (https=) * | 1950-10-11 | |||
| DE1112117B (de) * | 1957-10-24 | 1961-08-03 | Emma Widmaier Geb Hoffmann | Kohlemikrofon |
-
0
- BE BE464238D patent/BE464238A/xx unknown
-
1945
- 1945-04-21 CH CH245546D patent/CH245546A/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH245546A (de) | 1946-11-15 |