CWE / 1190/2018 当前世界环境 0125 - 888 0125 - 895 Enviro研究出版社 cwe - 53 - 59 - 000 瓦里、Effurun等大城市环境噪声污染评价 2 贝宁大学 化学系 贝宁城 尼日利亚 10.12944 / CWE.13.3.16 卷13 问题3 433 - 444 摘要

环境噪声污染不仅影响人们的生活质量,而且是一个严重的健康和社会问题。Cirrus integrated averaging sound level instrument: model CR262A was used to determine The noise levels at The 22 (22) selected sampling station . "噪音的测量是在早上,下午和晚上期间进行的,以评估噪音污染在双城。结果表明,每天不同时段各采样站的平均噪声值差异不大(p>0.05),但各采样站的平均噪声值存在显著差异(p<0.05)。噪声测量的结果表明,< span风格=“颜色:黑色”> Enerhen结和< / span > < span风格=“颜色:黑色”> NNPC复杂记录的最高及最低的总体噪声值84.84 < / span > < u > + u < / > <跨风格=“颜色:黑色”> < / span > 5.39 dB (A)和<跨风格=“颜色:黑色”> 70 .90跨度< / > < > u + u < / > <跨风格=“颜色:黑色”> < / span > 2.98dB(A) respectively. The results of this survey showed that the noise values at all the measurements points within Warri and Effurun metropolitan cities and at all the periods of the day is more than the Nigeria Federal Ministry of Environment (NFMEnv) and World Health Organization (WHO) permissible limit of 55dB daily noise level criteria for residential areas. The ssurvey requires the need to enact and enforce permissible noise levels/standards for residential neighbourhoods of 55dB by relevant environmental authorities both at Federal and state levels instead of applying 90dB standard meant for regulations in industrial settings.

关键字 评估 分贝 Effurun-Warri 环境 噪音 污染
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