The sound of a rushing stream, a waterfall, or liquid pouring into a glass is due to bubbles being formed. Bubble acoustics is also being applied to areas as diverse as ocean physics, medicine and baking biscuits.
Bubbles form the interfaces across which gas dissolves into liquid.
Their behaviour and size affects the rate of gas dissolution. There is a huge range of industries and natural systems in which a gas is dissolved into a liquid , ranging from your pet-fish tank to furnaces in the smelting industry many metres across. In all of these, bubbles crucially affect the performance of the system. As a bubble is formed or broken up, it suffers a severe distortion to its surface. As the surface recoils, the gas within the bubble gets compressed.