Video tour of the anatomy of the ear, presented by Beltone


Welcome to a tour of the ear. We’re
going to see how sound is collected, conducted, and transmitted to the brain. Sound is collected by the outer part ear,
known as the pinna. It then travels down the ear canal where it
comes in contact with the eardrum. When it hits the eardrum, it causes the eardrum to move. On the other side in the eardrum are the three smallest bones in the human
body: the hammer, anvil, and stirrup. As the eardrum moves, these bones move and conduct the sound to a small opening known as the oval window. This opening leads into the inner ear. This inner ear is a fluid-filled cavity and as the movement of the bones push into the oval window it causes waves to occur. These waves then strike the tiny little nerve
endings, known as hair cells, which causes them to move. When they move they release a chemical which causes an electrical impulse to
take place. This impulse is then transmitted to the
brain through the acoustic nerve, causing the
brain to interpret this as sound.

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