当超声波能量足够高时，就会产生“超声空化”现象，即指存在于液体中的微小气泡（空化核）在超声场的作用下振动、生长并不断聚集声场能量，当能量达到某个阈值时，空化气泡急剧崩溃闭合的过程。
Aerating gas to the black liquor increase the effect of ultrasonic cavitation, the order of degradation rate of different saturated gas is as follow: O2>Air>N2>degassed.
向反应液中曝入气体可以提高超声空化效果,饱和气体对黑液的超声降解效果影响顺序依次为:O2>Air>N2>未曝气。
参考来源 - 造纸废水的超声降解研究We design a Raman Spectrum sample cell into which can be introduced the Ultrasonic cavitation. Experiment on the laser Raman spectrum of acetone shows that Ultrasonic cavitation reduces the intensity of the spectrum.
本研究设计了一种可引入超声的喇曼光谱样品池．对丙酮的激光喇曼光谱的检测表明，超声空化降低了喇曼光谱的强度．我们认为，超声空化减少了激光光路上参与散射的丙酮分子数是光谱强度降低的主要原因。
参考来源 - 超声空化对丙酮激光喇曼光谱的影响Acoustic cavitation, which is similar to hydrodynamic cavitation, is applied to mix the oil and methanol system to make the two phases emulsify, and then particle size of emulsion drop is tested by laser particle size analyzer(Zetasizer 3000).
采用与水力空化具有相似效果的超声空化方法,对油脂和甲醇体系进行超声空化混合达到两相乳化,使用激光粒度测试仪Zetasizer 3000对酯交换过程中乳液液滴的粒径进行了测定。
参考来源 - 水力空化技术制备生物柴油的应用研究·2,447,543篇论文数据，部分数据来源于NoteExpress
并用超声空化理论解释实验结果。
而超声空化是很多超声应用的重要机理。
And a lot of ultrasonic cavitation is an important mechanism of ultrasound.
超声空化已成为当前医学超声研究的热题，其应用尚在探索阶段。
Ultrasound cavitation has become a hot topic in current medical ultrasound research, but its application is still in the primary stage.
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