Unlike hair growing on the surface of your ears, the presence of hairs, or "stereocilia," deep inside your head aren't considered a hygiene lapse. Instead, they're a vitally important part of your ability to hear, responsible for changing physical sound waves into electrical signals that can be understood by your brain, according to the British Hearing Research Trust. When stereocilia are hit with a sound vibration, they produce electricity and begin to "dance," stretching and compressing. In May 2008, researchers at St. Jude's Children's Research Hospital in Memphis figured out that this dancing, and the protein that causes it, is probably how stereocilia amplify sounds. If those tiny hairs can't dance, the brain they're connected to can't hear high-frequency sounds and might even be rendered deaf.
Thursday, April 2, 2009
You have 2 million tiny hairs in your inner ear
Unlike hair growing on the surface of your ears, the presence of hairs, or "stereocilia," deep inside your head aren't considered a hygiene lapse. Instead, they're a vitally important part of your ability to hear, responsible for changing physical sound waves into electrical signals that can be understood by your brain, according to the British Hearing Research Trust. When stereocilia are hit with a sound vibration, they produce electricity and begin to "dance," stretching and compressing. In May 2008, researchers at St. Jude's Children's Research Hospital in Memphis figured out that this dancing, and the protein that causes it, is probably how stereocilia amplify sounds. If those tiny hairs can't dance, the brain they're connected to can't hear high-frequency sounds and might even be rendered deaf.
