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- "Ultrasonics: Vibrational or stress waves in elastic media that have a frequency above 20 kilohertz, the highest frequency of sound waves that can be detected by the human ear. 超音波:弹性介质中的应力波，其频率在2万赫以上，最高频率超出人耳可听闻的声波频率。
- They were studying the reflection of sound waves. 他们在研究声波的反射。
- frequency of sound wave 声波频率
- Repetition of a sound by reflection of sound waves from a surface. 回声因表面反射声波而引起的声音重复
- To repeat(a sound) by the reflection of sound waves from a surface. 发出回声表面反射声波而重复的声音
- The papers talk about the influence of sound wave on the pallium, and the violin performance effect on the cerebra. 本文从声波对人类听觉和大脑皮层的作用,论及小提琴演奏对大脑的影响。
- The distinctive quality of a sound, dependent primarily on the frequency of the sound waves produced by its source. 音质声音的特性，主要依据从音源发出的声波的频率
- To demonstrate in middle schools the relations between high/low tune and vibrational frequency of sound source; the higher the frequency, the higher the tune and vice versa. 在中等学校里，演示音调高低与声源振动频率的关系。频率越大，音调越高。反之也然。
- 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。
- It is useful to the measurement of transmitted time of sound wave in acoustic pyrometry and to the sound source location of 'four-tubes' leaking in boiler based on TDE. 不仅为声学测温中的声波飞渡时间测量提供了指导，而且对基于时延估计的锅炉四管爆漏声源定位有一定的参考价值。
- Making use of sound wave measuring well data in triaxiality earthquake explore explain in Banji well,increase explain accuracy and get the verification in practice. 在板集井田三维地震勘探解释中充分利用井田内的声波测井资料,以提高解释精度,并在实践中得到验证。
- 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。
- The improved experiment device of interference of sound wave can feel the interference countervail and strengthening of sound in ordinary lab, and measure the sound velocity. 摘要本文给出了改进声波干涉实验装置的具体方案，该改进装置可在普通实验室内感受声音的干涉相消和干涉加强现象，并能测定声速和频率。
- The results showed that the effect of sound waves was very sensitive to the frequency change，which meant that orthokinetic interaction governed the process. 实验证明了声波团聚中存在最佳频率，在此频率下团聚效果最好，偏离该值团聚效果急剧降低。
- Echo:Repetition of a sound by reflection of sound waves from a surface. 回声:因表面反射声波而引起的声音重复.
- We can often correlate age with frequency of illness. 年龄的大小往往与发病率有关。
- For determining depth of water or a submerged object by means of sound waves. 通过声波确定水深或水中的物体。
- In a paper about to be published in the Journal of the Acoustical Society of America, Dr Declercq and Ms Dekeyser calculate how each frequency of sound behaves as it diffracts off the rows of seats. 他们计算出了各种频率的声音掠过这些凳子时所产生的不同效果，关于这项研究的论文不久将在一本美国声学界期刊上发表。
- Doppler Velocity Measurement System is a precise instrument, which is used to measure ship velocity and calculate its voyage on the theory of Doppler effect of sound wave in water. 多普勒测速系统是根据声波在水中的多普勒效应原理而制成的一种精密测速和计算航程的仪器。
- You hit them, then a wave of sound floats out. 当敲击锣的时候，就有声音的回响传出来。
