FR778751A - Microphone - Google Patents
MicrophoneInfo
- Publication number
- FR778751A FR778751A FR778751DA FR778751A FR 778751 A FR778751 A FR 778751A FR 778751D A FR778751D A FR 778751DA FR 778751 A FR778751 A FR 778751A
- Authority
- FR
- France
- Prior art keywords
- microphone
- Prior art date
- 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
- 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 |
|---|---|---|---|
| FR778751T | 1933-12-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR778751A true FR778751A (fr) | 1935-03-23 |
Family
ID=9202347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR778751D Expired FR778751A (fr) | 1933-12-12 | 1933-12-12 | Microphone |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR778751A (fr) |
-
1933
- 1933-12-12 FR FR778751D patent/FR778751A/fr not_active Expired
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