The ear has three main sections - the outer, middle, and inner ear. The outer ear collects sound waves and directs them through the ear canal to the eardrum. Vibrations of the eardrum are transmitted by the ossicles to the cochlea of the inner ear. Inside the cochlea, vibrations stimulate hair cells which convert the mechanical energy into electrical signals sent to the brain for interpretation as sound. - Download as a PPTX, PDF or view online for free