도로교통소음 저감을 위한 Active Noise Cancellation System 적용 및 평가

• 영문명: Evaluation and Application of Active Noise Cancellation System for Reduction of Traffic Noise
• 발행기관: 한국방재학회
• 저자명: 김도완 김연주 이상염 문성호 안덕순
• 간행물 정보: 『2. 한국방재학회 논문집』14권6호, 51~58쪽, 전체 8쪽
• 주제분류: 공학 > 기타공학
• 파일형태: PDF
• 발행일자: 2014.12.31

영문 초록

The objective of this study is to evaluate ANC(Active Noise Cancellation) system composed of the prediction model for SPL(SoundPressure Level) in accordance with the targeted frequencies. The ANC system and prediction model were developed in previous research. Its technical skills were based on ISO 9613. Moreover, we utilized the LimA Predictor to identify the accurate results of traffic noise obtained from measurement and prediction at the receiver points. To measure the traffic noise occurred at the road, the measurement method of Pass-by was conducted. This paper is focused on the reduction and superposition of sound longitudinal wave.:The theory of this paper is based on International Organization for Standardization 9613. In the frequency analysis, we conducted CPB(Constant Percentage Bandwidth) Analysis to determine the traffic noise properties related to the frequencies. In the previous research, FFT(Fast Fourier Transform) Analysis was used to eliminate the engine noise from the friction noise between the road and tire. The LimA Predictor was utilized to simulate the noise propagation and confirm the noise level. Also, the basic wave theory was applied to conduct the reduction of traffic noise from the prediction noise level. The study has shown that the reduction and superposition effect was almost from 11dB(A) to 22dB(A) when the superposition of waves is perfectly applied and the ANC system can be completely compatible with the practical traffic noise. The effect of sound wave reduction using ANC system at the relatively high frequencies was better than the low frequencies. Furthermore the errors of measurement and prediction were small at the range of high frequencies.

목차

1.서론

2.기존 연구

3.도로교통소음 측정

4.Noise Map 적용

5.ANC시스템 적용

6. 결 론

감사의 글

References

키워드

ANC시스템 음압 레벨 일정 대역폭 주파수 분석 NCPX계측방법 고속푸리에변환분석 Pass-by계측방법 등가소음레벨Active Noise Cancellation(ANC) System Sound Pressure Level(SPL) Constant percentage bandwidth analysis NCPX(Noble Close ProXimity) method Fast Fourier Transform(FFT) Analysis Pass-by method Equivalent noise level