KR970055232A - Car audio FM noise reduction device - Google Patents
Car audio FM noise reduction device Download PDFInfo
- Publication number
- KR970055232A KR970055232A KR1019950065799A KR19950065799A KR970055232A KR 970055232 A KR970055232 A KR 970055232A KR 1019950065799 A KR1019950065799 A KR 1019950065799A KR 19950065799 A KR19950065799 A KR 19950065799A KR 970055232 A KR970055232 A KR 970055232A
- Authority
- KR
- South Korea
- Prior art keywords
- electric field
- car audio
- field strength
- treble
- antenna
- Prior art date
Links
Landscapes
- Noise Elimination (AREA)
Abstract
마이컴을 이용하여 자동차의 주행시에 약전계의 수신시에 카 오디오의 트레블조정을 가변시켜 노이즈를 감쇄시키고 깨끗한 음질을 제공하는 카 오디오의 FM노이즈 감쇄장치가 개시된다. 본 발명은 안테나를 통하여 유입된 FM주파수의 전계강도를 판단하여 약전계라고 판단되면 트레블을 감소하는 방향으로 조정하는 방법을 기존의 HCC 회로에 의한 노이즈차단방법에 부가한다. 카오디오에 수신된 FM주파수의 전계강도를 감지바는 SM단자에서 수신된 주파수의 전계강도를 파악한 마이컴에의하여 전계강도가 약하면 출력되는 음성 신호에서 고음역을 강조하는 트레블조정을 미약하게 함으로써 고음부의 감쇄효과에 의한 약전계시 노이즈를 대폭 경감한다.Disclosed is an FM noise reduction device for car audio that uses a microcomputer to vary the treble adjustment of car audio when receiving a weak electric field while driving a car to reduce noise and provide clean sound quality. The present invention adds a method of determining the electric field strength of the FM frequency introduced through the antenna to adjust the direction of the treble to reduce the treble if it is determined to be a weak electric field to the noise blocking method by the existing HCC circuit. The microcomputer detects the electric field strength of the FM frequency received by the car audio. The microcomputer detects the electric field strength of the frequency received by the SM terminal. Significantly reduces noise during weak electric field due to effects.
※선택도:제2도※ Selectivity: The second
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.
제 3도는 본 발명에 따른 카 오디오의 FM 노이즈 감쇄장치를 동작을 설명하기 위한 흐름도이다.3 is a flowchart illustrating the operation of the FM audio attenuator for car audio according to the present invention.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950065799A KR970055232A (en) | 1995-12-29 | 1995-12-29 | Car audio FM noise reduction device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950065799A KR970055232A (en) | 1995-12-29 | 1995-12-29 | Car audio FM noise reduction device |
Publications (1)
Publication Number | Publication Date |
---|---|
KR970055232A true KR970055232A (en) | 1997-07-31 |
Family
ID=66624208
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019950065799A KR970055232A (en) | 1995-12-29 | 1995-12-29 | Car audio FM noise reduction device |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR970055232A (en) |
-
1995
- 1995-12-29 KR KR1019950065799A patent/KR970055232A/en not_active Application Discontinuation
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WITN | Withdrawal due to no request for examination |