Any sound above 20 000 Hz is called ultrasound. It is too high pitched for humans to hear, but other animals (such as dogs, cats, dolphins and bats) can hear ultrasound. Ultrasound waves are ...

So-called Rayleigh–Bloch waves can release enormous amount of energy that can damage technical systems under certain ...

So sound waves move slower through it, which amplifies the lower frequencies in your voice. But here's the fascinating thing. The pitch of your voice hasn't changed when you inhale either gas ...

Sound waves oscillate at rates that determine their pitch: Low-pitched sounds travel in slow waves, whereas high-pitched sound waves oscillate more frequently. The auditory nerve that relays ...

NEW YORK — Scientists have detected cosmic waves that sound like birds chirping in an ... their sharp notes mimic high-pitched bird calls. Researchers have captured such sounds in space before ...