The outer ear is the external portion of the ear, it consists of the pinna (auricle), the ear canal and the outer layer of the ear drum (tympanic membrane). It is the part of the ear that collects sound waves.
The ear bones also known as the ossicles form part of the middle ear. The bones function together to receive, amplify and transmit the sound from the eardrum to the inner ear.
The inner ear receives vibrations from the middle ear; it transmits these vibrations into signals passed along the vestibulocochlear nerve to the brain.