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. Other medical applications include injection-free epidermal drug delivery.