The natural frequency fn and damping constant σ of a bubble in liquid have been deter-mined by observing the resonance of the bubble to forced oscillation. The bubble was re-tained under a rigid plate horizontal disk, and the oscillation was applied by underwater speaker. The applied frequency f was kept constant while letting the bubble increase its volume and vary its radius R. Bubble resonance was detected by observing wrinkles appear-ing on the bubble due to surface waves. Resonance curves relating the amplitude of bubble radius variation to the intensity of applied oscillation is derived theoretically.Good agreement was seen between the data obtained from experiment and the theoreti-cally derived resonance curves at test to the validity of the method proposed of determining fn and σ from bubble resonance. The values of σ and of the resonant bubble radius R0 of large steam bubbles (8.5 mm展开▼
机译：通过观察气泡对强迫振荡的共振，可以确定液体中气泡的固有频率fn和阻尼常数σ。将气泡保留在刚性板水平盘下，并通过水下扬声器施加振动。施加的频率f保持恒定，同时使气泡增加其体积并改变其半径R。通过观察由于表面波而出现在气泡上的皱纹来检测气泡共振。理论上推导了气泡半径变化幅度与施加振动强度的共振曲线。实验数据与理论推导的共振曲线之间的一致性很好，证明了确定fn和fn的方法的有效性。气泡共振产生的σ。在f = 270、290和358Hz处确定水中的大蒸汽气泡（8.5 mm 展开▼
