Experiments and simulations show that the proposed system can operate in audio switch frequency range without audio noise from the motor load, meanwhile, EMI can be limited to low level.
实验与仿真结果表明：该系统采用音频开关而不导致电机负载的音频噪声，同时使EMI能被限制在低电平。
A comparison study on two situations, with and without coal load on a steel plate, has been carried out by using audio and ultrasonic frequency.
应用声超声及超声穿透试验对钢板上有无煤负载两种情况进行了对比研究。
A comparison study on two situations, with and without coal load on a steel plate, has been carried out by using audio and ultrasonic frequency.
应用声超声及超声穿透试验对钢板上有无煤负载两种情况进行了对比研究。
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