The frequency of ultrasound is therefore greater than 20,000 hertz. Ultrasound, like audible sounds, is transmitted by means of longitudinal waves. Ultrasound is used in medicine to break up ...

For the first time, scientists have confirmed a 50-year-old theory about wave amplification using electromagnetic waves.

A fibrous composite foam employs the triboelectric effect and in situ electrical energy dissipation to absorb low-frequency ...

Billionaire Brain Wave is a theta-based sound frequency that is said to target the hippocampus and help people attract ...