Transactions of the Korean Society for Noise and Vibration Engineering (한국소음진동공학회논문집)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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A Study on the Test Method for Noise Reduction Devices Installed on the Noise Barriers

방음벽 상단 소음저감장치의 감음성능 평가방법 연구

  • Received : 2009.07.29
  • Accepted : 2010.08.20
  • Published : 2010.09.20
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Abstract

Installing noise barriers is the most common method for reducing the highway traffic noise to the road side residential area. After the report about edge potential concept of a noise barrier, various types of noise reducing devices(NRDs) called "noise reducers" have been suggested for getting more shielding effect on the top of highway noise barriers. But, it has been doubtful about effect of the NRDs in field because there was no appropriate and unified method to estimate the acoustic performance by using field measurement of the NRDs in Korea. In this study, the authors have considered to setup a practical method to test and estimate the acoustic performance of NRDs. For eliminating the noise reduction effect of the NRDs height itself, the source and measuring points are adjusted as highly as the NRDs height. For the frequency weighting in the estimation of the NRDs effect, the highway noise spectra were measured at asphalt and concrete road side and then averaged for a unit spectral parameter.

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References

  1. Fujiwara, K. and Furuta, N., 1991, “SoundShielding Efficiency of a Barrier with a Cylinder atthe Edge,” Noise Control Engineering Journal, Vol.37, No. 1, pp. 5-11. https://doi.org/10.3397/1.2827789
  2. Notification No. 954(on July 17, 1992), JapaneseGovernment of Construction.
  3. Okubo, T. and Yamamoto, K., 2007, “Proceduresfor Determining the Acoustic Efficiency ofEdge-modified Noise Barriers,” Applied Acoustics,Vol. 68, pp. 797-819. https://doi.org/10.1016/j.apacoust.2006.04.002
  4. Kim, D. S., et al., 2005, “A Study on theComputation and Application of Sound Power Levelfor Road Traffic Noise of Renewal Area,”Transactions of the Korean Society for Noise andVibration Engineering, Vol. 15, No. 6, pp. 635-644. https://doi.org/10.5050/KSNVN.2005.15.6.635

Cited by

  1. A Study on the Development of a Noise Reduction Device Installed at the Top of Noise Barrier for the 400 km/h Class High-speed Railroad vol.23, pp.9, 2013, https://doi.org/10.5050/KSNVE.2013.23.9.823
  2. A Study on the Device Installed on the Barrier for The Environmental Noise Reduction in 400 km/h High Speed Railway vol.39, pp.12, 2017, https://doi.org/10.4491/KSEE.2017.39.12.679