• Title/Summary/Keyword: Measurement Noise

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A Study on the Characteristics of Applicability in the Active Noise Cancellation System and Measurement of the Road Noise for Traffic Calming (교통환경 정온화를 위한 도로 소음의 측정 및 ANC시스템에의 적용 특성 고찰)

  • Moon, Hak-Ryong;Shon, Jin-Geun
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.62 no.3
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    • pp.111-116
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    • 2013

  • Noise problem that occurs on the road is raising a lot of problems in the economic, social and environmental aspects. The objective of this paper is to propose ANC(active noise cancellation)-based road traffic noise reduction algorithm-model which can reduce noise by generating frequency opposed to noise sources to improve and complement the problem that existing physical form of a noise barrier. In this paper, we measured the noise characteristic from collection of two difference car noise also ANC simulation has been performed by using road traffic noises input. In order to compare the control performance, we performed noise reduction simulation of ANC by filtered-X LMS algorithm and delayed control signal injection. As a result of this simulation, we confirmed that convergence performance and noise decrease effect to the filtered-X LMS algorithm by inputting the road traffic noise.

  • https://doi.org/10.5370/KIEEP.2013.62.3.111 인용 PDF KSCI

Installation Effect on Noise Reducer for Railway Traffic Noise (철도환경소음을 줄이기 위한 소음감소기의 설치제안)

  • Kim, Jeung-T.;Hong, Yoon-H.
    • Journal of the Korean Society for Railway
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    • v.10 no.3 s.40
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    • pp.278-283
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    • 2007

  • Community noise, especially a rail traffic noise has been serious social issues in Korea. Our society needs practical tools to reduce noise levels for public who live near the railway lines. This paper proposes a noise reducer for railway traffic noise. At the beginning, various types of reducers are discussed, with the advantages and disadvantages with respect to acoustical phenomena. Then, the acoustic effects are discussed based on an insertion loss measurement. After several types of reduces are installed at fields, the noise level is monitored with and without the reducer. The result shows that the proper selection of reducers affects the noise level by 6 dB. The statistics of the mean and a standard deviation turns out to be 3.2 dB and 0.8 dB, respectively. Noise reducers are strongly recommended for the place where apartments are densely constructed alone the railway. Installation of noise reducers seems to be an effective and practical solution for the community traffic noise reduction.

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