NO310540B1 - Telefon for håndfri betjening - Google Patents
Telefon for håndfri betjening Download PDFInfo
- Publication number
- NO310540B1 NO310540B1 NO19920310A NO920310A NO310540B1 NO 310540 B1 NO310540 B1 NO 310540B1 NO 19920310 A NO19920310 A NO 19920310A NO 920310 A NO920310 A NO 920310A NO 310540 B1 NO310540 B1 NO 310540B1
- Authority
- NO
- Norway
- Prior art keywords
- signal
- voltage
- output
- detection circuit
- control
- Prior art date
Links
- 238000001514 detection method Methods 0.000 claims description 40
- 238000013016 damping Methods 0.000 claims description 34
- 230000005236 sound signal Effects 0.000 claims description 34
- 230000005540 biological transmission Effects 0.000 claims description 14
- 230000003321 amplification Effects 0.000 claims description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 6
- 230000001747 exhibiting effect Effects 0.000 claims description 2
- 238000000926 separation method Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000001427 coherent effect Effects 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
- 238000000034 method Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
-
- 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
- H04M1/04—Supports for telephone transmitters or receivers
- H04M1/06—Hooks; Cradles
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Telephone Function (AREA)
- Mobile Radio Communication Systems (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019910008595A KR940002146B1 (ko) | 1991-05-27 | 1991-05-27 | 핸드프리 작동의 유무선 전화기 |
Publications (3)
Publication Number | Publication Date |
---|---|
NO920310D0 NO920310D0 (no) | 1992-01-23 |
NO920310L NO920310L (no) | 1992-11-30 |
NO310540B1 true NO310540B1 (no) | 2001-07-16 |
Family
ID=19314969
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO19920310A NO310540B1 (no) | 1991-05-27 | 1992-01-23 | Telefon for håndfri betjening |
Country Status (6)
Country | Link |
---|---|
US (1) | US5396550A (fi) |
KR (1) | KR940002146B1 (fi) |
DK (1) | DK207791A (fi) |
FI (1) | FI920393A (fi) |
NO (1) | NO310540B1 (fi) |
SE (1) | SE9200053L (fi) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100327731B1 (ko) * | 1995-07-04 | 2002-07-31 | 삼성전자 주식회사 | 스피커폰통화종료시통화로자동절단회로및자동대기방법 |
US5892823A (en) | 1996-03-27 | 1999-04-06 | Hello Direct, Inc. | Smart interface technology |
KR100247004B1 (ko) * | 1997-05-13 | 2000-03-15 | 윤종용 | 휴대용 무선단말기의 간섭 제거 방법 |
JP3070523B2 (ja) * | 1997-05-30 | 2000-07-31 | 日本電気株式会社 | 無線通信機 |
US6741873B1 (en) * | 2000-07-05 | 2004-05-25 | Motorola, Inc. | Background noise adaptable speaker phone for use in a mobile communication device |
JP4567804B1 (ja) * | 2009-11-30 | 2010-10-20 | パナソニック株式会社 | ハウリング抑制装置、マイク装置、アンプ装置、拡声システムおよびハウリング抑制方法 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3889059A (en) * | 1973-03-26 | 1975-06-10 | Northern Electric Co | Loudspeaking communication terminal apparatus and method of operation |
US4700382A (en) * | 1986-03-03 | 1987-10-13 | American Telephone And Telegraph Company, At&T Information Systems, Inc. | Voice-switched telephone circuit with center idle state |
-
1991
- 1991-05-27 KR KR1019910008595A patent/KR940002146B1/ko not_active IP Right Cessation
- 1991-12-23 US US07/812,164 patent/US5396550A/en not_active Expired - Lifetime
- 1991-12-30 DK DK207791A patent/DK207791A/da not_active Application Discontinuation
-
1992
- 1992-01-10 SE SE9200053A patent/SE9200053L/ not_active Application Discontinuation
- 1992-01-23 NO NO19920310A patent/NO310540B1/no unknown
- 1992-01-29 FI FI920393A patent/FI920393A/fi unknown
Also Published As
Publication number | Publication date |
---|---|
SE9200053L (sv) | 1992-11-28 |
SE9200053D0 (sv) | 1992-01-10 |
FI920393A (fi) | 1992-11-28 |
KR940002146B1 (ko) | 1994-03-18 |
FI920393A0 (fi) | 1992-01-29 |
DK207791D0 (da) | 1991-12-30 |
KR920022736A (ko) | 1992-12-19 |
US5396550A (en) | 1995-03-07 |
NO920310L (no) | 1992-11-30 |
DK207791A (da) | 1992-11-28 |
NO920310D0 (no) | 1992-01-23 |
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