There are several ways of evaluating how well a hearing aid compensates for hearing loss. Below are three of the most common options.
Audiometry
One approach is audiometry, which measures a subject’s hearing levels in laboratory conditions. The advantage of testing in a lab is that threshold levels for various sounds and intensities can be measured under a variety of conditions.
According to the National Institutes of Health, you may have a hearing problem if you answer yes to three or more of the questions below. If you do, you should consider setting up an appointment with a doctor that specializes in diagnosing and treating diseases of the ear,
A recent study from Johns Hopkins and the National Institute on Aging has found that for older adults with impaired hearing, brain tissue loss happens faster than it does for those with normal hearing.
The results and conclusions are effectively summarized in this article from Hub,