When birds or insects fly, they displace air with their wings – that is how it works. Maybe sometime at night you have disturbed an owl and heard the flap of its large wings. This sound is a frequency ...

Standing in a tropical forest at night, you might hear what sounds like a small bird calling from high in the canopy. Listen more closely, though, and that “bird” turns out to be an insect with ...

A human volunteer stands in a room furnished with a speaker. Sounds begin to play that are so unpleasant that the human steps back to move away. The sounds are eerie and conjure otherworldly beings, ...