Author(s): Song Wenqian, Wu Junqi, Shang Xinjian, School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Dongying District Housing and Urban-Rural Construction Bureau
Pages: 32-36
Year: 2014 Issue:  1
Journal: Journal of Beijing Institute of Civil Engineering and Architecture
Keyword:  plastic drain pipe; noise; pipe wrapping; acoustic material; equivalent consecutive sound level A;
Abstract: By means of pipe wrapping the control of the noise of plastic drain pipe to acoustic material is researched. The effect of noise reduction in medium and low frequency,medium and high frequency and high frequency is analysed based on the thickness,the density and surface density of each acoustic material. In medium and low frequency and medium and high frequency,acoustic foam has the best effect of noise reduction,and its equivalent consecutive sound level A reduced 3. 85 dB and 6. 89 dB respectively; in high frequency,barrier mat has the best effect of noise reduction,and its equivalent consecutive sound level A reduced 16. 55 dB. In medium and low frequency and medium and high frequency,thickness is a big factor affecting the noise reduction effect of acoustic material. In high frequency,the noise reduction effect of acoustic material can be greatly influenced by the thickness and density.