It can also improve scientific understanding of bubble dynamics. In molten metal processes, bubbles occur owing to entrainment, dissolved gases or sparging. Here, knowledge of the bubble size distribution would be an immediate advantage. Applications include pouring molten metals, void removal in die castings, and oxygen injection in steelmaking. In the environment , bubbles formed by breaking ocean waves control the absorption of atmospheric carbon dioxide by the seas.
Bubbles generate much of the high-frequency noise in the ocean.
Ocean acoustic spectra, originally studied by submariners, now finds an application in greenhouse-effect modelling. Aeration has also been proposed to oxygenate rivers or to control salt seepage through weirs. Bubble acoustics also has applications in the human body . Micro bubbles affect the absorption of ultrasound used for diagnostic or therapeautic purposes. Cracking joints are attributed to bubbles in synovial fluid.