• Title/Summary/Keyword: Human Noise and Vibration

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Development of a Test Dummy for the Evaluation of Driver's Response to Vehicle Vibration (운전 자세에서의 인체진동 평가용 시험용 더미 개발)

  • 장한기;홍석인;송치문;김기선;이정훈;김광준
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2004.05a
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    • pp.105-108
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    • 2004

  • This paper introduces a process of the development of a vibration test dummy for the posture of inclined seating. Experimental devices was invented to measure apparent mass curves on the contact point of the hip and the back of a seated human body. During the excitation of a rigid seat secured to a hydraulic exciter, force and acceleration signals were measured on the contact points to determine the apparent mass. In order to describe nonlinear characteristics of a human body, seven levels of Gaussian random signal were used for the base excitation. The modeling of the human body will be performed using measured apparent mass curves. The modeling will be done by June and the prototype of the test dummy will be invented in the following six months.

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investigation on Human Effects of Vibration and Noise Exposed on Human： II. Human Noise (인체 진동 소음의 인체 영향에 대한 국외 기술 조사： 인체 소음)

  • 권휴상;정완섭
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2001.11b
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    • pp.687-690
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    • 2001

  • 환경문제로써 소음에 대한 민원이 증가하고 관심이 커지면서 소음에 의한 인체의 영향 연구의 필요성이 제기되고 있다. 이에 대한 국내의 연구가 미미하고 산업보건의 관점에서 다루어져 왔기 때문에 먼저 국외 기술조사를 바탕으로 연구의 동향을 파악한다. 환경요인으로써 인체 영향 소음을 정의하는 인자로 어노이언스(annoyance)가 많이 사용되고 있으며 소음레벨과 관련하여 다양한 정량화 모델이 제시되고 있다. 소음이 의한 인체의 손상에 대해서는 많은 가능성과 연관성이 제시되고 있지만 그 발생 메커니즘은 아직 구체적으로 밝혀지지는 않았다. 보고서들01 의하면 장기간의 소음 노출에 의해서 다양한 건강 손꼴이 나타나며 안락감의 파괴로부터 시작하여 만성적인 질환으로 발전한다고 추정한다.

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The Sound Quality Analysis of Environmental noise by Jury Testing (주관평가 방법에 의한 환경소음 음질평가)

  • 조경숙;허덕재;조연
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2004.05a
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    • pp.712-717
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    • 2004

  • Recently, the concern for the environmental noise has increased due to the growing of the living standard. The environmental noise regulations based on the equivalent noise level are widely used. However, the noise level, which Is based mainly on the magnitude with A-weighting, the important characteristics of noises in frequency and time domains and the impulsive nature cannot be assessed properly. These can have substantial effects on how human respond to noise. Therefore, the noise evaluation methodology based on the sound quality rather than the equivalent noise level can be more suitable to represent human response to the environmental noise. This paper describes the study on environmental noise quality analysis for various noises. A cluster analysis was carried out and the noises were classified into several clusters using the values of sound quality metrics. The classification was confirmed by comparing time and frequency characteristics of the noises. And then the result of Jury testing was analysis.

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A Study on the Evaluation of Vibration's Environment in a Korean Rail Vehicles based on the Human Vibration (인체 진동을 고려한 국내의 철도 차량의 진동 환경 평가에 관한 연구)

  • 김진기;정완섭;홍동표
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2001.05a
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    • pp.1100-1104
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    • 2001

  • This paper introduces experimental results related to the vibration ride conditions that a korean male subject experienced in the railway trains and the express bus. Two types of railway train's, Samaulho and Mugunghwaho, and the express bus were chosen to measure how much the whole-body vibrations of the back, hip and feet are exposes to the subject. Measured vibration signals were analysed to assess the ride conditions quantitatively and qualitatively. Analysed results are illustrated to see how much typical public transportation systems in korea expose vibration to passengers.

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