Deafness is typically the results of labyrinth or nerve injury. it should be caused by a congenital abnormality, injury, disease, sure medication, exposure to bang or age-related wear and tear. The chief symptom is associate inability to listen to sound.For some, hearing could also be doable with surgery or a hearing device. Lip-reading skills, written or written text and linguistic communication might facilitate with communication. hearing disorder, hearing loss or hearing impairment could be a partial or total inability to listen to. it's caused by many various factors, as well as however not restricted to age, noise, illness, chemicals and physical trauma. there's a diagnosing to work out the severity of the hearing disorder, and it's measured in decibels. it should be stratified as delicate, moderate, moderately severe, severe or profound. There area unit variety of measures that may be taken to forestall hearing impairment, however in some cases it's not possible to reverse or forestall. several new technological advancements are created to boost the hearing of these World Health Organization area unit hearing impaired. However, a number of these technologies have caused contention within the deaf community. Deaf Studies area unit educational disciplines involved with the study of the deaf social lifetime of human teams and people as well as social science, economics, geography, history, government,
