BE413455A - - Google Patents
Info
- Publication number
- BE413455A BE413455A BE413455DA BE413455A BE 413455 A BE413455 A BE 413455A BE 413455D A BE413455D A BE 413455DA BE 413455 A BE413455 A BE 413455A
- Authority
- BE
- Belgium
- Prior art keywords
- telephone set
- transmitter
- specified
- receiver
- mouthpiece
- Prior art date
Links
- 239000012528 membrane Substances 0.000 claims description 8
- 239000003610 charcoal Substances 0.000 claims description 3
- 239000008187 granular material Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 239000003245 coal Substances 0.000 claims description 2
- 238000005192 partition Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims 4
- 239000008188 pellet Substances 0.000 claims 2
- 230000035945 sensitivity Effects 0.000 claims 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 claims 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims 1
- 238000010276 construction Methods 0.000 description 9
- 229920001875 Ebonite Polymers 0.000 description 3
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000009877 rendering 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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE413455A true BE413455A (enrdf_load_html_response) |
Family
ID=76983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE413455D BE413455A (enrdf_load_html_response) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE413455A (enrdf_load_html_response) |
-
0
- BE BE413455D patent/BE413455A/fr unknown
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