BE564167A - - Google Patents
Info
- Publication number
- BE564167A BE564167A BE564167DA BE564167A BE 564167 A BE564167 A BE 564167A BE 564167D A BE564167D A BE 564167DA BE 564167 A BE564167 A BE 564167A
- Authority
- BE
- Belgium
- Prior art keywords
- telephone
- amplifier
- coupling
- microphone
- opening
- Prior art date
Links
- 230000008878 coupling Effects 0.000 claims description 62
- 238000010168 coupling process Methods 0.000 claims description 62
- 238000005859 coupling reaction Methods 0.000 claims description 62
- 238000013016 damping Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000001939 inductive effect Effects 0.000 description 4
- 230000003321 amplification Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 229920001821 foam rubber Polymers 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
- H04M1/62—Constructional arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/21—Combinations with auxiliary equipment, e.g. with clocks or memoranda pads
- H04M1/215—Combinations with auxiliary equipment, e.g. with clocks or memoranda pads by non-intrusive coupling means, e.g. acoustic couplers
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE564167A true BE564167A (enrdf_load_html_response) |
Family
ID=185136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE564167D BE564167A (enrdf_load_html_response) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE564167A (enrdf_load_html_response) |
-
0
- BE BE564167D patent/BE564167A/fr unknown
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