Hearing loss is a common problem caused by noise, disease, aging, illness, and genetics. General signs of hearing loss occurs suddenly and develops gradually that includes asking people to repeat themselves, listening to music or television with a higher volume than required. There are two main types of hearing loss depending on where the problem lies they are conductive hearing loss, sensorineural hearing loss.
Sensorineural is caused by damage to the auditory nerve that occurs naturally with age. There are several options that help to improve a person’s ability to hear and communicate which includes digital hearing aids, cochlear implants, middle ear implants, bone anchored implants, wireless devices, etc. The 35delG mutation was detected in 11/ 712 unrelated blood donors.
The total prevalence at school entry of unilateral (in one ear) and bilateral (in both ears) mild to profound hearing loss is thought to be of the order of 3 to 4 per 1,000; that means between 3,000 to 4,500 preschool and school age children in Ireland will have a permanent hearing impairment, with potential consequences for education, communication, literacy, social and emotional development, and later employability.