1·When sound frequency increases, the sound absorbent coefficient of porous aluminum alloy increases.
当声波频率增加时，多孔铝合金的吸声系数增大。
2·Small, low impedance, the high pressure resistance electric capacity, mainly applies to the sound frequency dividing circuit.
小型，低阻抗，高耐压电容，主要应用于音响分频电路。
3·Extracting the sound frequency features is vital for the noise diagnosis expert system to detect the gear processing error in a transmission.
汽车变速器齿轮制造缺陷声频特征的提取，是汽车变速器噪声故障诊断专家系统准确诊断齿轮制造缺陷的关键。
4·Umbilical arterial Doppler spectrum were obtained by color Doppler ultrasound, then Doppler signal were transformed into computer through sound frequency, and fractal were calculated.
用彩色多普勒超声检测脐动脉并获得多普勒信号，将此信号以音频形式输入计算机中，对此信号进行处理并计算分数维。
5·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。
6·Regular repeating actions such as sound waves, light waves, or radio waves have a certain frequency, or number of waves per second.
有规律的重复活动如声波、光波、无线电波都有一个特定的频率，或者说是每秒的波动次数。
—— 《柯林斯英汉双解大词典》
7·The quicker it vibrates, the greater the frequency of sound it produces.
它振动得越快，发出的声音频率就越高。
8·Basically, the phenomenon of Standing Waves occurs when sound waves of the same frequency reflect off the walls and meet from opposite directions.
基本上，当相同频率的声波从墙壁上反射并从相反方向相遇，就会出现驻波现象。
9·A vibration that has a higher or lower frequency than a sound, he found, tends to skew pitch perception up or down.
频率超过或低于声音频率的震动会分别引起音高知觉的上调和下调。
10·It is the perfect shape for producing a brilliant, expressive and infinitely variable sound in the same frequency range as the human voice.
这种结构是十分完美的，它使得小提琴可以产生美妙的，富有表现力的，以及在人声的频率范围内无限多变的声音。