BE439769A - - Google Patents
Info
- Publication number
- BE439769A BE439769A BE439769DA BE439769A BE 439769 A BE439769 A BE 439769A BE 439769D A BE439769D A BE 439769DA BE 439769 A BE439769 A BE 439769A
- Authority
- BE
- Belgium
- Prior art keywords
- membrane
- housing
- microphone
- wall
- pressure compensation
- Prior art date
Links
- 239000012528 membrane Substances 0.000 claims description 108
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 19
- 229910052799 carbon Inorganic materials 0.000 claims description 18
- 230000001681 protective effect Effects 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 8
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 3
- 239000004800 polyvinyl chloride Substances 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 claims description 2
- 239000003570 air Substances 0.000 description 15
- 238000007789 sealing Methods 0.000 description 6
- 238000005192 partition Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011257 shell material Substances 0.000 description 1
- 238000004078 waterproofing 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)
- Telephone Set Structure (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE442183T |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE439769A true BE439769A (en:Method) |
Family
ID=3869679
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE439769D BE439769A (en:Method) | |||
| BE446109D BE446109A (en:Method) | |||
| BE442183D BE442183A (en:Method) |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE446109D BE446109A (en:Method) | |||
| BE442183D BE442183A (en:Method) |
Country Status (1)
| Country | Link |
|---|---|
| BE (3) | BE442183A (en:Method) |
-
0
- BE BE439769D patent/BE439769A/fr unknown
- BE BE446109D patent/BE446109A/xx unknown
- BE BE442183D patent/BE442183A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BE442183A (en:Method) | |
| BE446109A (en:Method) |
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