Random pulse width modulation technique can be used to distribute voltage harmonics over a wide frequency range and to realize the reduction of acoustic noise and vibration.
随机脉宽调制技术可以使逆变器输出电压的谐波成分均匀地分布在一个较宽的频率范围内，达到抑制噪声和机械振动的目的。
This paper introduces a method to generate square wave of high resolving power and wide frequency range.
介绍了一种高分辨率宽频域方波脉冲的产生方法。
Test results show that the signal power supply has good stability, wide frequency range and good performance.
实验结果表明本信号电源工作稳定、频率变化范围大，同时具有良好的动静态性能。
It has high value of practical engineering application with the advantages of simple circuit design, high sensitivity and wide frequency range.
电路设计简炼，灵敏度高，频率范围宽，具有较高的工程应用价值。
Johnson noise is uniformly distributed over a wide frequency range, so reducing the noise bandwidth effectively decreases the noise in the measurement.
约翰逊噪声在很宽的频率范围内呈均匀分布，所以减小噪声带宽能够有效地降低测量中的噪声。
Has a microphone with a single directivity and a wide frequency range.
频率范围宽的单指向性话筒，高质量的拾音效能。
It can not only measure DC current magnetic field but also alternative current magnetic field. This system has small volume, high capability, and wide frequency range.
本智能磁场测量系统既适合测量直流磁场，又可测量交变磁场，且体积小，性能高，适用频率范围宽。
The results show that with low loading level the metal coated CFF provides excellent EMS property in a wide frequency range due to its cavity structure and metallic coating.
研究表明：利用碳毡的孔洞结构和尺寸，辅之以金属镀层，能在较宽的频率范围内对电磁波有良好的屏蔽效率，且不需要很大的填充量。
The time-domain pulse antenna has the ability to radiate and receive the fast changed transient signal, because this kind of pulse radiation antenna has very wide frequency range.
时域脉冲天线具有辐射和接收快速变化的瞬态脉冲信号的能力，这种脉冲天线能够覆盖很宽的频带。
In the process of bearing defect detection and diagnosis, the faulty bearing vibration signals are scattered in a wide frequency range, which can be easily masked by noise and low-frequency effects.
在轴承缺陷检测和诊断的过程中，有缺陷的轴承振动信号分散在一个较宽的频带范围，很容易被噪声和低频信号所掩盖。
In the process of bearing defect detection and diagnosis, the faulty bearing vibration signals are scattered in a wide frequency range, which can be easily masked by noise and low-frequency effects.
在轴承缺陷检测和诊断的过程中，有缺陷的轴承振动信号分散在一个较宽的频带范围，很容易被噪声和低频信号所掩盖。
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