Basically, if you have two ears with hearing loss that could benefit from hearing aids, you need two hearing aids. It is important to realize there are no “normal” animals born with only one ear. Simply stated, you have two ears because you need two ears.
Hearing loss occurs to most people as they age. Hearing loss can be due to the aging process, exposure to loud noise, certain medications, infections, head or ear trauma, congenital (birth or prenatal) or hereditary factors, diseases, as well as a number of other causes.
An audiologist is a person who has a masters or doctoral degree in audiology. Audiology is the science of hearing. In addition, the audiologist must be licensed or registered by their state (in 47 states) to practice audiology.
Results of the audiometric evaluation are plotted on a chart called an audiogram. Loudness is plotted from top to bottom. Frequency, from low to high, is plotted from left to right.