According to error analysis of sound level measurement and practical case some objection was raised to levy standard on Noise Exceeding Environment standard.
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。
At last, correction method of low level signal measurement is discussed duo to effect of spectrum analyzer floor noise.
最后，讨论了频谱仪本地噪声对低电平信号测量影响的修正方法。
The influence of wind velocity on noise measurement of sound level has been introduced and the permitted wind velocity has been determined.
介绍了风速对噪声声级测量的影响，确定了噪声测量的风速允许值。
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