The minimum fluidization velocity has a minimum value when the frequency of sound waves approached 150 Hz, whereas it decreased as the sound pressure level was increased at the same sound frequency.
气泡尺寸和鼓泡频率随声压的增大而减小,随声波频率的增大先减小后增大。
By using ultrasonic frequency,pulse transmission technique was used to probe the dispersion and attenuation mechanism of flu- id-saturated rock in laboratory.
在超声波频率下,利用脉冲透射法,探讨了实验室条件下流体饱和岩石的频散和衰减机制,对不同围限压力下的干燥和不同粘度流体饱和砂岩样品的衰减特征进行了系统的研究。
The desulfurization rate presented a positive relationship with the ultrasonic power,but a negative relationship with ultrasonic frequency within the range of 25 kHz to 60 kHz.
频率25～60kHz范围内,二氧化硫脱除率与超声波频率呈负相关,25kHz处理效果最佳,依次为40、60kHz。
The middle part of an audio frequency.
中声频，中频声波频率的中间部分
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。
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。
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
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。
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。
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
Ultrasonic frequency adjustable driver's circuit design
一种频率可调超声波驱动电路的设计
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。
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。
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
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
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
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。
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。
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
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
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。