Droplet Immersion Sound

2007/04/01 Elhuyar Zientzia Iturria: Elhuyar aldizkaria

• Fisika

Not all drops falling into the water emit the same noise. The sound varies by drop speed and drop angle. But both are not the only factors involved. The composition of gout also influences; drops with hydrophobic substances on the outside produce sounds much louder than those containing hydrophilic substances. The physicists of the University of Lyon in France have found why: if there are substances that dampen water, the water molecules of the area do not bind with gout, and as the gout is dipped a bubble of air forms. The bigger the bubble, the more noise it produces.