Biology And Biocentrism

Our Ears Use Vibrations To Create Sound 

We hear sounds when vibrations get inside our ears and stimulate our nerves to send electrical signals to our brain.

Suppose, for instance, that you are pounding on a drum. The drumhead starts vibrating. As the drumhead vibrates, it bumps into air molecules and starts them bouncing to and fro. Those bouncing air molecules bump into other air molecules and start them moving. This chain reaction of moving air molecules carries sound through the air in a series of pulsating pressure waves that we call sound.

Sound waves carry vibrations from the drum into your ears. Inside your ear, moving air molecules push on your eardrum and start it vibrating. Your eardrum, in turn, pushes on the bones of your middle ear, the tiniest bones in your body. These bones act like a set of levers, pushing against the thin membrane that covers the opening to your inner ear. The movement of this membrane makes pressure waves in the fluid inside the cochlea, where cells with tiny sensing hairs transform the waves into electrical signals. These electrical signals travel along the auditory nerve to your brain. When these electrical signals reach your brain, you hear a sound - the beat of a drum.