How is hearing loss caused?
The outer ear of a person collects sound waves like a dish. The sound waves are amplified during the process of reaching the ear canal, causing the tympanic membrane to vibrate. This vibration is transmitted to the inner ear filled with liquid through the ossicular chain. The inner ear hair cells vibrate to turn the sound signal into an electrical pulse, and the electrical pulse passes through the cochlea. The auditory nerve is transmitted to the brain and translated into a meaningful voice in the brain.
Hearing loss is mainly divided into sensorineural hearing loss and conductive hearing loss. The main cause of sensorineural hearing loss is damage to the cochlea or auditory nerve,Such as cochlear hair cell lesions or hair cell degeneration,Make hair cells unable to transmit sound properly. Degeneration of hair cells often occurs in the elderly (senile hearing loss); long-term exposure of the human ear to a noisy environment can also lead to hair cell degeneration. Sensorineural hearing loss is the most common type of hearing loss.
Conductive hearing loss refers to the obstruction of the conduction of sound in the auditory pathway. In some cases, surgery can be treated
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