Hearing loss can be genetic or caused by the natural aging process, diseases, accidents or exposure to loud noises such as Noise-induced Hearing Loss and certain kinds of chemicals and medications. Auditory Neuropathy is another form where the nerves that carry sound information to the brain are damaged or malfunction.
Conductive hearing loss can be caused by such things as too much earwax, Outer Ear Infections, malformation of outer ear, middle ear or the ear canal structures, a punctured or perforated eardrum, a fluid build-up in the middle ear due to colds, or abnormal bone growth in the Middle Ear such as Otosclerosis, allergies and infections, chronic ‘glue ear’ or Middle Ear infection, called Otitis Media, malfunctioning of the Eustachian tube, invasion of foreign particles in the ear, and mental trauma. It is more common in children and indigenous populations.
The causes of Sensorineural hearing loss may be continuous exposure to loud noise (commonly called industrial deafness), head trauma, birth trauma, complications from premature birth, malformation of inner ear, presbycusis (a common type of Sensorineural Hearing Loss caused by the natural aging of the auditory system), viral infections like rubella, measles, mumps and cytomegalovirus, diseases, hereditary causes, Meniere’s disease, tumors, and certain drugs.
Mixed Hearing Loss can occur when a person with Presbycusis also has an Ear Infection.