Hearing is the ability to perceive sound by hearing vibrations of of frequency ranging from 20 Hz to 20 kHz. The ear is divided into three parts: outer, middle, and inner ear. The outer ear comprises the auditory canal and ear drum, the middle ear comprises ossicles (stapes, malleus, and incus), and the inner ear comprises the auditory nerve and cochlea. Hearing loss is a common problem caused due to repeated exposure to loud noise and age related hearing problems. There are mainly two types of hearing loss- conductive hearing loss and sensorineural hearing loss. Conductive hearing loss is caused due to the reduced mobility of ossicles, or as a result of blockage such as earwax, and glue ear. It can be treated with surgery.
Sensorineural hearing loss is caused due to the damage of cochlea or deterioration of hair cells or nerves in the ear. It can be corrected with the help of hearing aids, middle ear implants, and cochlear implants. Hearing aids are electronic hearing devices, which consist of a speaker, microphone, and amplifier. Microphones are used to accept the sound, amplifier is used to formulate the sound louder, and speaker is used to transmit the amplified sound into the ear canal. These devices are used to amplify sound in the hearing aid and make sound audible and comfortable for the patient.
For More info Click Here.