Ultrasound is produced by high frequency vibrations beyond the range of human ... Ultrasound, like audible sounds, is transmitted by means of longitudinal waves. Ultrasound is used in medicine ...

NASA has turned pressure waves ... notes audible to humans. The sound waves were extracted along the radius of the galaxy, outwards from its centre, and were transformed into the range of ...

Optical data hold the middle range, and X-rays are at the ... It was the first time these sound waves had been extracted and made audible. So what's going on here? We might not be able to hear ...