... ambient noise 环境噪声；外界噪声 ambient noise level 环境噪声级 ambient operating temperature 环境工作温度 ...
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依据声级测量的误差分析，结合实例，对国家现行《超标环境噪声排污费征收标准》提出异议。
According to error analysis of sound level measurement and practical case some objection was raised to levy standard on Noise Exceeding Environment standard.
烟尘控制区逐年扩大，市区区域环境噪声等效声级56.6分贝，达到国家规定的控制目标。
Smoke and dust control area is extending year by year, and noise in urban area is controlled below 56.6 DB, meeting the national standard.
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