Browse > Article
http://dx.doi.org/10.6110/KJACR.2016.28.6.224

A Study on the Absorption Performance of a Perforated Panel type of Resonator  

Song, Hwayoung (Department of Energy System Engineering, Graduate School of Energy and Environment, Seoul National University of Science and Technology)
Yang, Yoonsang (Department of Energy System Engineering, Graduate School of Energy and Environment, Seoul National University of Science and Technology)
Lee, Donghoon (Department of Mechanical and Automotive Engineering, Seoul National University of Science and Technology)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.28, no.6, 2016 , pp. 224-231 More about this Journal
Abstract
When aiming to reduce the low frequency noise of a subway guest room through sound absorbing treatment methods inside the wall of a tunnel the resonator is often more effective than a porous sound absorbing material. Therefore, the perforated panel type resonator embedded with a perforated panel is proposed. The perforated panel is installed in the neck, which is then extended into the resonator cavity so that it can ensure useful volume. The absorption performance of the perforated panel type of resonator is obtained by acoustic analysis and experiment. The analytical results are in good agreement with the experimental results. In the case of multiple perforated panel type resonators, as the number of perforated panels increase, the 1st resonance frequency is moved to a low frequency band and sound absorption bandwidth is extended on the whole. In order to obtain excellent absorption performance, the impedance matching between multi-panels should be considered. When the perforated panel in the resonator is combined with a porous material, the absorption performance is highly enhanced in the anti-resonance and high frequency range. In case of the resonator inserted with perforated panels of 2, the 2nd resonance frequency is shifted to a low frequency band in proportion to the distance between perforated panels.
Keywords
Resonator; Absorption coefficient; Perforated panel; Impedance;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Nelson, J. T., 1997, Wheel/rail noise control manual, National academy press.
2 Hong, C. K., Jeong, R. T., and Kim, B. H., 2008, A study on an analysis of noise reduction effects using the tentatively installed sound-absorbing materials in metro tunnel, proceedings of the korean society for railway annual autumn conference, pp. 125-131.
3 Choi, J. K., Lee, J. W., and Chang, S. I., 2001, A study on squeal noise control by absorption treatment in urban rail transit system, Transactions of the Korea Society for Noise and Vibration Engineering, Vol. 11, No. 4, pp. 58-64.
4 Selamet, A. and Lee, I., 2003, Helmholtz resonator with extended neck, Journal of Acoustic Society of America, Vol. 113, pp. 1975-1985.   DOI
5 Tang, S. K., 2005, On the helmholtz resonators with tapered necks, Journal of Sound and Vibration, Vol. 279, pp. 1085-1096.   DOI
6 Sanada, A. and Tanaka, N., 2013, Extension of the frequency range of resonant sound absorbers using two-degree-of-freedom helmholtz-based resonators with a flexible panel, Applied Acoustics, Vol. 74, pp. 509-516.   DOI
7 Song, H. Y. and Lee, D. H., 2008, A study on the acoustic absorption performance of a helmholtz resonator, Transactions of the Korea Society for Noise and Vibration Engineering, Vol. 18, No. 1, pp. 71-79.   DOI
8 COMSOL Multiphysics 4.3b, Acoustics module user's guide copyright, 1998-2013.
9 Munjal, M. L., 1987, Acoustics of ducts and mufflers, Wiley, New York, pp. 75-85.
10 Delany, M. E. and Bazley, E. N., 1970, Acoustical properties of fibrous absorbent materials, Applied Acoustics, Vol. 3, pp. 105-116.   DOI