新一代窗帘花边机-迪赛唯窗帘花边机机器参数产品型号：DG6-01电压（Voltage）:220V 超声波频率（Ultrasonic frequency）:..
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超声波功率与频率 Ultrasonic power and frequency
好在这些声音是超声波频率，所以我们听不到这些声音。
The good news is that because this call has an ultrasonic frequency, we are unable to hear it.
国外在这方面有较系统的研究，并提出了一种预测零频到超声波频率之间全部速度频散的分析技术。
It has been researched systematically on abroad, and an analysis technology was put forward to predict all the velocity's dispersive of frequency from zero to ultrasonic frequency.
换能器由阵列微压电结构组成，这种压电材料在合适频率下的振动能够将电信号转换成超声波。
Transducers are made from arrays of tiny piezoelectric structures that convert electrical signals into ultrasound waves by vibrating at an appropriate frequency.
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