1.
The middle part of an audio frequency.
中声频，中频声波频率的中间部分
2.
The good news is that because this call has an ultrasonic frequency, we are unable to hear it.
好在这些声音是超声波频率，所以我们听不到这些声音。
3.
Broadband: A band of light wave or sound wave with a wide range of frequencies.
阔波段:频率范围广的一段光波或声波。
4.
Visco-acoustic transmission waveform inversion for velocity structure in space-frequency domain
频率域粘弹性声波透射波形速度反演
5.
Chirp up the chirp is played from start frequency to the end frequency.
短促声波开始短促声波从起动频率对结束频率播放。
6.
The frequency, wave length, and speed of sound are closely related.
频率，波长和声速三者是密切相关的。
7.
Frequency noise of the ionization wave in He-Cd lasers
氦-镉激光器电离波频率噪声的研究
8.
Ultrasonic frequency adjustable driver's circuit design
一种频率可调超声波驱动电路的设计
9.
The video signal is directed to the CRT through a sound trap which eliminates the sound-carrier frequency.
视频信号通过声音陷波电路，消除声音载波频率，直达CRT。
10.
Hot firings show that the frequency of the oscillating shock is close to the acoustic frequency.
热试结果表明，振荡激波的频率与声频相近。
11.
An X band Low Phase Noise Wideband Frequency Synthesizer
X波段宽带低相位噪声混频锁相频率源
12.
The application of frequency division technique in parameter measurement for SAW sensor
分频技术在声表面波传感器频率测量中的应用
13.
Design of a Microwave Frequency-Hopping Synthesizer Based on Phase Noise Analysis
基于相位噪声分析的微波跳频频率合成器设计
14.
We know light waves are different in frequency just as sound waves are.
我们知道光波像声波一样在频率方面是不同的。
15.
Suppose the speakers both emit a pure sinusoidal sound wave of constant frequency.
假定两个扬声器都发射恒定频率的纯正弦声波。
16.
Research and Realization of an Ultrasonic Cleaner with Constant Power and Frequency Tracing;
频率跟踪、恒功率超声波清洗机的研究与实现
17.
Study of Upper Frequency Limit and Noise Output Power Characteristics for Microwave Solid State Noise Diodes
微波固体噪声二极管频率上限和噪声输出功率性能的研究
18.
Like light waves, acoustic (sound) waves are characterized by a frequency, wavelength and propagation speed.
声波就和光波一样，是以频率、波长和传播速度为其特徵。