rest frequency

Results The leq ( A) did not exceed about criterion in polystyrene machine, rest room, control room, whereas most sound levels were distributed below 200 Hz by frequency analysis.

结果测量发现聚苯乙烯造粒机、聚乙烯造粒机、休息室。控制室的A计权网络的等效声级均未超过有关的标准，而频谱分析则发现其主要的声强级均分布在200Hz以下。

The rest are executed automatically by high-frequency trade algorithms.

其他都是自动交易，由高效的交易软件去完成。

It was compared with the high frequency noise caused by traffic about sleep, work and rest.

低频噪声烦恼度与中高频噪声烦恼度的研究结果在对睡眠 、 工作及休息上有差异.