有源消声技术对于管道中低频噪声的控制非常有效。
The technique of active attenuation of noise is very effective for controlling the low frequency noise in ducts.
目的了解中低频噪声接触对电力生产工人健康的影响，为采取切实有效的防范措施提供依据。
To learn the effect of middle and low frequency noise on the health of electricity producing workers, and to provide basis for finding effective preventive measures.
结论中低频噪声接触导致作业工人听觉系统、神经系统、心血管系统、消化系统以及代谢功能的影响。
Middle and low frequency noise may affect workers' hearing system, nervous system, cardiovascular system, digestive system and metabolism.
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