How tiny stones inside our heads tell us which way is up...
Well, for one thing, the problem goes deeper than just your ears.
Ultrasound uses high frequency sound waves to create pictures of what is going on in our body.
Cowboys in Western movies sometimes puts their ear to the ground to listen for a stampede or wagon train. Elephants can also communicate by hearing vibrations.
Have you ever wondered how simple megaphones like cupping your hands around your mouth amplify your voice so well?
Researchers placed tiny microphones inside a pregnant woman's uterus and found that outside noises are much lower and muffled; about thirty decibels quieter!
Mantids are some of the most impressive insect predators, regularly snaring other insects or even the occasional lizard, snake or frog.
Humans detect the direction a sound comes from by comparing the difference in time of arrival, or loudness of the sound, so why is there a difference?
In the Academy Award-winning movie “Ray,” the young, recently blinded Ray Charles is shown to have very finely tuned hearing. Standing very still in the middle of a room, he is able to track down the hushed movements of a small bug. It was even reported that Jamie Foxx, the actor who played Ray Charles, when he was artificially blinded began to tune in to sounds he otherwise would not have noticed. Is it true that blind people have better, almost supernatural hearing abilities? Learn more on this Moment of Science.
Have you heard the term otoacoustic emissions? They are the noises that your ears generate and emit. Learn more on this Moment of Science.