The interior low frequency noise of passenger car has direct influence on its comfort.
乘用车的车内低频噪声直接影响其乘座舒适性。
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。
High speed frequency water cooling spindle, high precision, low noise, long life.
高速变频水冷主轴，高精度，低噪音，寿命长。
However, OFDM is sensitive to frequency offset and phase noise.
然而，OFDM系统对频率偏差和相位噪声比较敏感。
In this dissertation, a low phase noise millimeter wave point frequency source is studied.
本文研究设计了一个低相噪毫米波点频源。
Low noise, high gain, high transition frequency.
低噪音，高增益，高频。
Low temperature coefficient, high precision, low noise, and good high frequency performance.
温度系数小、精度高、噪声低、高频性能好。
Objective To study the effects of high frequency steady noise on cardiovascular system.
目的观察高频稳态噪声对心血管系统的影响。
Objective To study the effects of high frequency steady noise on cardiovascular system.
目的观察高频稳态噪声对心血管系统的影响。
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