When you hear music, a telephone call, a pin drop, your auditory system…

• converts sound into vibrations of the three middle ear bones
• the last middle ear bone is attached to the cochlea, which transforms vibration to electric potentials inside the sensory hair cells
• which creates action potentials in auditory-nerve fibers (axons)
• which are processed by the auditory pathway located in your brain

• Neuroscience for Kids
• Cochlear Mechanics
• Synapses
• Eric Chudler’s Neuroscience Education Web Page