Levitation is no longer just the realm of magicians, with engineers dabbling in ways to suspend objects in midair using magnets, heat flow or sound waves. Unfortunately, it usually only works with ...

Moth wing scales, which are used for camouflage against bats, act as ultrasound-absorbing metamaterials, according to a study. Bats track prey using ultrasound-mediated echolocation, and moth species ...

Researching on underwater acoustic tomography using the time of flight measurements, to accomplish high precision and tight time synchronization of the network for generating reliable temperature maps ...