Hearing loss - symptoms and how to test
Hearing loss is diagnosed when an individual's thresholds for audible sound are more than 20 decibels (dB) in one or both ears. Though it may strike at any age due to various factors, those over 60 are most frequently affected. Each ear may be affected to varying degrees, and the severity can range from modest to profound. The volume and pitch ranges of sounds are measured in a hearing test. An audiogram is a graph used to determine the extent of hearing loss and its potential causes.