BE489105A - - Google Patents
Info
- Publication number
- BE489105A BE489105A BE489105DA BE489105A BE 489105 A BE489105 A BE 489105A BE 489105D A BE489105D A BE 489105DA BE 489105 A BE489105 A BE 489105A
- Authority
- BE
- Belgium
- Prior art keywords
- amplifier
- handset
- accessory according
- feedback
- microphone
- Prior art date
Links
- 230000035945 sensitivity Effects 0.000 claims description 6
- 230000006698 induction Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims 1
- 238000005070 sampling Methods 0.000 claims 1
- 230000003313 weakening effect Effects 0.000 claims 1
- 230000003321 amplification Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000009365 direct transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 230000009467 reduction 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
- H04M1/02—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
- H04M1/2155—Acoustic coupling
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE489105A true BE489105A (enrdf_load_html_response) |
Family
ID=134142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE489105D BE489105A (enrdf_load_html_response) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE489105A (enrdf_load_html_response) |
-
0
- BE BE489105D patent/BE489105A/fr unknown
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