FR534835A - - Google Patents
Info
- Publication number
- FR534835A FR534835A FR534835DA FR534835A FR 534835 A FR534835 A FR 534835A FR 534835D A FR534835D A FR 534835DA FR 534835 A FR534835 A FR 534835A
- Authority
- FR
- France
- 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)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR534835A true FR534835A (en(2012)) | 1922-04-03 |
Family
ID=1537190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR534835D Expired FR534835A (en(2012)) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR534835A (en(2012)) |
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0
- FR FR534835D patent/FR534835A/fr not_active Expired