This double frequency distortion can be used to double frequency of incident signal.

这种倍频失真可用于对入射信号进行倍频。

youdao

It can explain the double frequency chatter and the change of superior frequency in chattering process.

该规律能全面描述机床双频颤振现象和颤振过程主频带移动的原因。

youdao

The range of double frequency is from 1 to 999. The double frequency number is selected directly by software.

该倍频器的倍频范围为1～999，倍频值可直接由软件选择；

youdao

The Swiss Federal Railways has improved efficiency in recent years too, by using double-decker trains and increasing its trip frequency.

BBC: Are the Swiss really that efficient?

The SS-AR2's incorporated drivers support a maximum input power of 100 watts through a 25 mm (one inch) soft dome, a 130 mm (five inch) sliced-paper cone and a 165 mm (six and a half inches) aluminum cone (double-drive system), producing a frequency response from 42 Hz to 60kHz.

ENGADGET: Sony reveals SS-AR2 loudspeaker, wants an invite to your next house party