DE140614C - - Google Patents
Info
- Publication number
- DE140614C DE140614C DENDAT140614D DE140614DA DE140614C DE 140614 C DE140614 C DE 140614C DE NDAT140614 D DENDAT140614 D DE NDAT140614D DE 140614D A DE140614D A DE 140614DA DE 140614 C DE140614 C DE 140614C
- Authority
- DE
- Germany
- Prior art keywords
- membrane
- electrode
- electrodes
- auxiliary
- chamber
- 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.)
- Active
Links
- 239000012528 membrane Substances 0.000 claims description 27
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 230000000284 resting effect Effects 0.000 claims 1
- 239000003245 coal Substances 0.000 description 8
- 239000002184 metal Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
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)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE140614C true DE140614C (enrdf_load_stackoverflow) |
Family
ID=408286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT140614D Active DE140614C (enrdf_load_stackoverflow) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE140614C (enrdf_load_stackoverflow) |
-
0
- DE DENDAT140614D patent/DE140614C/de active Active
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