How many degrees of hearing loss are there?

Conductive or transmission hearing loss is that which involves the external or middle ear. Its name refers precisely to the fact that it affects the part of the auditory system that is responsible for the transmission of acoustic signals to the middle ear. The causes of this type of hearing loss are usually infections, trauma , benign tumors , or congenital malformations . And the usual symptoms are difficulty hearing sounds and the intelligibility of speech. People with conductive or transmission hearing loss feel that sounds are very muffled, as if they had a plug in their ear.

In sensorineural or perceptual hearing loss, the damage is localized to the inner ear or to the nerves that transmit acoustic signals to the brain. In this case, the most common causes of this type of hypocausia are congenital, although they can also be related to aging ( presbycusis ), trauma, exposure to loud sounds , or reactions to medications considered ototoxic .

In mixed hypocausia, hence its name, lesions occur both in the transmission channels and in those related to the neurosensory system. This combination of damage and affected areas is what makes hearing loss more complex to address and treat, with more severe consequences.

Depending on the type of hearing loss, and its degree of affectation, the specialist will recommend one of the two existing hearing solutions: hearing aids or hearing implants. Hearing aids are almost always prescribed for conductive or transmission hearing loss, as they are for sensorineural or transmission hearing loss if it is not severe or profound. When sensorineural hearing loss is profound (either of sudden or congenital origin) cochlear implants are usually recommended. In the case of Osseo integrated implants, tend to be more effective in people with conductive hearing loss, as this type of solution transfers sound through the bone directly to the inner ear in the form of vibrations.

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