Sascha Hilgenfeldt, Siegfried Grossman and Detlef Lohse extended the model by making the bubble’s temperature dependent on its volume and by making an allowance of the small emissivity of the weakly ionized gas inside the bubble. The latter term allows for the fact that experiments have shown that only Nobel gases remain inside the bubble during sonoluminescence.

According to their model, sonoluminescence is caused by thermal bremsstrahlung (energy produced by ionised particles changing their velocities) and recombination. In the latter process positive ions and electrons recombine and release their excess energy as photons.

One long-term aim in sonoluminescence research is to create the conditions under which deuterium and tritium will undergo thermonuclear fusion in a table-top experiment.