Prediction of bubble sound emissions using coupled oscillators

Bubble sounds potentially offer valuable data on many systems in nature and industry. In reality, multiple bubbles are always present, confusing measurements. A coupled-oscillator model shows that the pulse of sound typically measured represents beats between eigenmodes of a multi-bubble system. Using only the first two eigenmodes of the system, the base and beat frequencies of experimental data can be predicted, permitting the size and spacing of bubbles to be related to the pulse frequencies alone