This type of hearing loss is usually the result of an obstruction of the outer or middle ear that prevents sound transmission to the inner part of the ear. Causes of this type can include fluid or earwax stuck in the ear, tumors, objects that block the middle ear, and issues with the formation of the ear. Conductive hearing loss may cause soft sounds to be hard to hear and louder sounds may appear muffled.
This is the most common form of hearing loss that is usually due to damage of the inner ear or nerves. This damage causes the transmission of nerve signals to the brain to be weakened, resulting in muffled sounds. The causes of this type include normal aging, exposure to loud noises, or genetic syndrome in children. Although this damage is usually permanent, the use of hearing aids is commonly used to improve hearing from sensorineural hearing loss.
This type of hearing loss is a combination of sensorineural and conductive hearing loss and occurs when a combination of damage to the outer, middle, inner ear, or nerve pathway happen at the same time. This type is often caused by the trauma of the ear or when one type of hearing loss builds on the other over a longer period of time. An example of mixed hearing loss would be sensorineural hearing loss from noise exposure combined with a wax buildup in the eardrum.