Hardness of hearing
Category B - full version without watermark 720x576 (check terms and conditions at www.teledesign.de) The embed version with watermark is free of charge. The ear consists of three parts: the outer ear, the middle ear and the inner ear. The outer ear is the visible part of your ear. It collects sound, which then travels down your ear canal (to your eardrum. The sound waves cause your eardrum to vibrate. This vibration is passed on to the middle ear, which consists of three small bones called the 'ossicles'. These amplify and conduct the vibrations to the inner ear. The inner ear contains the cochlea, which is shaped like a snail shell. The cochlea is full of fluid and contains tiny hair cells. The ossicles transmit the vibrations to the fluid inside the cochlea, causing the hair cells to move. The movement of the hair cells produces an electrical signal that travels along the auditory nerve to your brain. Different types of hair cell pick up different frequencies of sound. Damage to the hair cells by loud noises can cause hearing loss.