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철도 방음벽의 전면 타공과 흡음재 변화에 의한 흡음성능 고찰A Study of Sound Absorbing Characteristics of the Railway Noise Barrier with Respect to Front Perforated Panel and Absorbing Material
- Other Titles
- A Study of Sound Absorbing Characteristics of the Railway Noise Barrier with Respect to Front Perforated Panel and Absorbing Material
- Issue Date
- 2014
- Publisher
- 한국소음진동공학회
- Keywords
- Noise Barrier; Absorption Coefficient; Perforated Panel; Noise Barrier(방음벽); Absorption Coefficient(흡음률); Perforated Panel(타공판)
- Citation
- 한국소음진동공학회논문집, v.24, no.4, pp.275 - 281
- Journal Title
- 한국소음진동공학회논문집
- Volume
- 24
- Number
- 4
- Start Page
- 275
- End Page
- 281
- ISSN
- 1598-2785
- Abstract
- This study has been analyzed the sound performance of the noise barriers with respect to the configuration of the front perforated panel geometries and the filled absorption materials. Noise barriers’ acoustic performance should be required to meet 0.7 of NRC value at least. The global absorbing performance of the barriers have been investigated by changing the opening ratio of the front perforated panel and the absorbing characteristics of the absorbing material using two microphone method. Therefore, It it possible to obtain to increase acoustic performance of the specific frequency ranges by designing the perforate rates of the front panel and absorbing characteristics of the absorbing materials inside, as well. This study try to find out the possibilities of applying the absorbing noise barrier to railway usage.
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