통합 검색 | Korea Science

김정수;신재성;강연준
- 한국소음진동공학회:학술대회논문집
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- 한국소음진동공학회 2002년도 춘계학술대회논문집
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- pp.1081-1085
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- 2002
A modeling is developed to predict the isolation performance of sound barrier systems under the sound pressure radiated from excited by point impact. The predicted results are compared with the measured results obtained by using APAMAT II. This instrument provides a combination of structure-borne noise and air-borne noise, which corresponds to rolling noise, by applying the excitation system projected steel balls against the steel sheet.
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장강석;심상덕;김영찬;김두훈
- 한국철도학회:학술대회논문집
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- 한국철도학회 2000년도 춘계학술대회 논문집
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- pp.537-542
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- 2000
When visual intrusion Is an Important factor, it is desirable to find alternative methods of Improving the insertion loss of a noise barrier without Increasing the height. Therefore, the primary object of the work attenuate the noise due to railway by small interference device installed at noise barrier edge. In this paper the performance of noise barriers with attached interference device, in terms of shape, absorptive material and split panel, we examined using the boundary element approach. Also, the scale models are mounted in an anechoic chamber and the frequency of the sound sources are appropriately scaled to simulate full scale site conditions. Lastly, experimental measurements of the designs are executed for a range of frequencies and receiver positions, and are compared with the results of numerical modeling.
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신재성;강연준;성명호;김현석
- 한국소음진동공학회:학술대회논문집
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- 한국소음진동공학회 2001년도 춘계학술대회논문집
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- pp.1180-1184
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- 2001
This paper presents the effect of air gap insertion on the results in measuring the transmission loss of sound barrier by using APAMAT. The measured results show that air gap insertion improves transmission loss as by two-room method or intensity method. The measured results are compared with the predicted transmission loss using MATLAB GUI program based on the transfer matrix method. Predicted results were found to be in reasonable agreement with measured results.
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신재성;강연준
- 한국소음진동공학회:학술대회논문집
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- 한국소음진동공학회 2001년도 추계학술대회논문집 II
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- pp.877-881
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- 2001
In this paper, a model is developed that can predict insulation performance of sound barrier systems under the action of multiple random point impact. The predicted results are compared with the measured results obtained by using APAMAT II. The results show the error due to the difference between experimental environment and theoretical assumptions. The model is needed to be improved to obtain better agreement between predicted and measured results.
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