BE343089A - - Google Patents
Info
- Publication number
- BE343089A BE343089A BE343089DA BE343089A BE 343089 A BE343089 A BE 343089A BE 343089D A BE343089D A BE 343089DA BE 343089 A BE343089 A BE 343089A
- Authority
- BE
- Belgium
- Prior art keywords
- diaphragm
- telephone transmitter
- transmitter according
- electrodes
- granular
- Prior art date
Links
- 239000000463 material Substances 0.000 claims description 26
- 239000011810 insulating material Substances 0.000 claims description 14
- 239000008187 granular material Substances 0.000 claims description 10
- 239000004020 conductor Substances 0.000 claims description 9
- 229920001971 elastomer Polymers 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 239000007779 soft material Substances 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 3
- 239000010445 mica Substances 0.000 claims description 3
- 229910052618 mica group Inorganic materials 0.000 claims description 3
- 238000013016 damping Methods 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 14
- 229920001875 Ebonite Polymers 0.000 description 4
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 230000003321 amplification Effects 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 230000000284 resting effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 229920001342 Bakelite® Polymers 0.000 description 1
- 229920002160 Celluloid Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000004637 bakelite Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 239000002966 varnish Substances 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
- H04R21/026—Microphones in which the sound is perpendicular to the current crossing the transducer 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 |
|---|---|
| BE343089A true BE343089A (cs) |
Family
ID=19450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE343089D BE343089A (cs) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE343089A (cs) |
-
0
- BE BE343089D patent/BE343089A/fr unknown
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