文章摘要
陈兴,梁志坚,阙秀明.公路隧道噪声降噪案例研究[J].声学技术,2008,(2):244~246
公路隧道噪声降噪案例研究
Highway tunnel noise reduce case studies
投稿时间:2007-08-31  修订日期:2007-11-19
DOI:
中文关键词: 隧道噪声  混响时间  吸声构造  隧道降噪预估
英文关键词: tunnel noise  reverberation time  absorptive structure  prediction of tunnel noise reduction
基金项目:
作者单位
陈兴 香港新光国际有限公司 
梁志坚 香港新光国际有限公司 
阙秀明 香港新光国际有限公司 
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中文摘要:
      隧道型公共设施的声环境,可以使用大量具有高吸声系数的吸声构造,铺设于隧道拱壁及轨道铺面,以降低混响时间及噪声。文中以在湖南省常张高速公路关口哑隧道吸声安装工程为例,在铺设吸声构造后,其混响时间在装吸声构造后在各1/3倍频带约减少64%~84%,预估降噪量则为4.7~8.5dB之间,在200Hz~800Hz之间,降噪量则有7.1dB~8.5dB之间,降噪效果显著。如以实际公路噪声特性预估,降噪量约有6.3dB(A),SIL(speech interference level)则有6.6dB改善效果。
英文摘要:
      The reverberation time and noise level of tunnel-typed public works can be reduced by adding large amount of acoustical structure with high absorptive coefficient.These absorptive structures can be applied on the curved wall and track bed.After applying the CEMCOM acoustical material,the reverber-ation time was reduced about 64%~84% and the noise reduction level was predicted about 4.7dB~8.5dB in the measured 1/3 octave bands for the Guan-Kou-Ya tunnel of Chang-Zhang highway,Hunan Province.Especially,the predicted noise reduction levels are about 7.1 dB to 8.5 dB between 200 Hz and 800 Hz in the measured 1/3 octave band.Using a noise spectrum from a current express way,the noise reduc-tion level is predicted about 6.3 dB(A) and the speech interference level is reduced about 6.6 dB.
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