BE379629A - - Google Patents
Info
- Publication number
- BE379629A BE379629A BE379629DA BE379629A BE 379629 A BE379629 A BE 379629A BE 379629D A BE379629D A BE 379629DA BE 379629 A BE379629 A BE 379629A
- Authority
- BE
- Belgium
- Prior art keywords
- emi
- currents
- fact
- telephone
- communications
- Prior art date
Links
- 230000005540 biological transmission Effects 0.000 claims description 8
- 238000004804 winding Methods 0.000 claims description 6
- 244000045947 parasite Species 0.000 claims description 4
- 230000010355 oscillation Effects 0.000 claims description 3
- 230000003071 parasitic effect Effects 0.000 claims description 2
- 230000002146 bilateral effect Effects 0.000 claims 1
- 239000012634 fragment Substances 0.000 claims 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K1/00—Secret communication
- H04K1/02—Secret communication by adding a second signal to make the desired signal unintelligible
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE735902X | 1931-05-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
BE379629A true BE379629A (enrdf_load_stackoverflow) |
Family
ID=3879300
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE379629D BE379629A (enrdf_load_stackoverflow) | 1931-05-07 |
Country Status (2)
Country | Link |
---|---|
BE (1) | BE379629A (enrdf_load_stackoverflow) |
FR (1) | FR735902A (enrdf_load_stackoverflow) |
-
0
- BE BE379629D patent/BE379629A/fr unknown
-
1932
- 1932-04-25 FR FR735902D patent/FR735902A/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR735902A (fr) | 1932-11-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2145717A (en) | Multiplex telecommunication system | |
Kim et al. | A review of assistive listening device and digital wireless technology for hearing instruments | |
US20050175189A1 (en) | Dual microphone communication device for teleconference | |
US3718765A (en) | Communication system with provision for concealing intelligence signals with noise signals | |
US9049402B2 (en) | Method of synchronizing the playback of an audio broadcast on a plurality of network output devices | |
US8170229B2 (en) | Audio privacy apparatus and method | |
BE379629A (enrdf_load_stackoverflow) | ||
TW200412176A (en) | Apparatus and method for generating a directional acoustic wave | |
US7532714B1 (en) | Method for discrete communication with a meeting speaker during a teleconference | |
FR2680934A1 (fr) | Dispositif d'amplification pour un reseau de distribution de television par cable. | |
US3908094A (en) | Telephone transceiver with amplified microphone and speaker | |
US7471945B2 (en) | Methods and apparatus for preventing a third party from overhearing a telephone conversation | |
US6937875B2 (en) | Mobile telephone with local communication option | |
US2269565A (en) | Communication system | |
US1647242A (en) | Recording and reproducing system | |
Emling | General aspects of hands-free telephony | |
US838545A (en) | Multiple telegraphy and telephony. | |
US1416061A (en) | Radioreceiving system having high selectivity | |
RU2103833C1 (ru) | Устройство громкоговорящей связи | |
BE334338A (enrdf_load_stackoverflow) | ||
US1537126A (en) | Loud-speaker circuit | |
Killion | Digital cell phones and hearing aids: The problem is mostly solved | |
JPH09307626A (ja) | 拡声情報通信システム | |
FR3010597A1 (fr) | Dispositif de communication sonore sans fil bidirectionnelle | |
US879438A (en) | Telephony. |