... on the tips of these cells detect the vibrations, enabling the cells to transmit signals to the brain, which interprets it as sound. (Encarta. msn 2005). "For an ear to function fully and give us access to sound, all of these elements must work well. Deafness happens when at least one part of this system is not working effectively."(National Deaf Children's Society 2005). Deafness can range from mild to profound and can be caused by many different events, including hereditary disorders, injury, disease and genetic defects. The main types of deafness are conductive deafness and sensorineural deafness. Conductive deafness is where sound cannot pass through the outer or middle ear. This can be caused by infections such as mumps and meningitis, ear infections like Otitis media, glue ear, which is a common childhood illness when a thick fluid can build up in the ear canal blocking the ear canal and reducing ...

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