合理确定齿轮泵的工作转速，使齿轮与轴的转动避开啮合共振频率，可以防止噪声加剧。
Rationally define the work gear pump speed, gear and the axis of rotation to avoid engaging resonance frequency, can prevent noise intensified.
DUT和互连电缆也应该是屏蔽的，防止拾取噪声。
The DUTs and interconnect cabling should also be shielded to prevent noise pickup.
虽然这些方法在大多数测量中能控制和减少噪声，但是一些技术只是防止噪声进入系统，而其他只是去除信号中的外来噪声。
Although these methods can control and reduce the noise in most measurements, some techniques just prevent noise from entering the system, whereas others remove only extraneous noise from the signal.
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