交流声

有时候，亚音频会被错误的认为是电源交流声。

It is sometimes mistaken for a power supply hum .

交流声问题的故障查找

Troubleshooting a hum problem

有线电视系统的交流声干扰现象的成因及其对策

Wired Television System 's Exchange Sonic Disturbance Phenomenon Origin and Countermeasure

金属化薄膜电容器交流声机理及消声技术研究

AC Noise Mechanism and Silence Technology of Metallized Film Capacitor

绿色环保、高效的开关电源设计，既节能，又彻底解决交流声噪音干扰问题。

The environment-preserved and high efficient power switch design not only saves energy but completely solve the problem of ac noise interference .

同时分析了现场扩声中极易出现的交流声、啸叫声产生的原因，并介绍了有关应对的方法。参考文献7。

It also has analyzed the reason why hum and whistle cry are frequently produced and has introduced the method to deal with them . 7 refs .

交流电动机电容器的交流声是由金属化膜的静电力和电磁力引起的振动产生的。

The AC noise of motor capacitor comes into being through the vibration caused by MPP ′ s static force and electromagnetic force .