Low frequencies correspond to deep sounds, like a bass drum; high frequencies correspond to sharp sounds, like a whistle. Controlling where sound goes is difficult because of a phenomenon called ...

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 ...

It describes how sound waves are created through vibrations, how they can be visualized using electrical devices, and how different frequencies affect pitch. The film demonstrates the properties ...

“Second sound is the hallmark of superfluidity, but in ultracold gases so far you could only see it in this faint reflection ...

Directing sound to a specific location is difficult because of how sound waves behave. As vibrations move through the air, ...

high frequencies correspond to sharp sounds, like a whistle. Controlling where sound goes is difficult because of a phenomenon called diffraction – the tendency of sound waves to spread out as ...