Based on an s injection method of reducing work frequency, a novel signal generator is developed.
介绍一种降低频率的S注入法信号发生装置。
Rock wool has good absorption function for medium and low frequency noise and various types of vibration noise. This will be very favorable for reducing noise and improving work environment.
尤其对中低频和各种振动噪声均有良好的吸收效果，十分有利于减少噪音污染，改善工作环境。
For reducing the work noise, it is effective, to lower the work frequency.
为了减小工作噪音，降低工作频率是有效的。
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