One vs. Two Hearing Aids: You have two ears because you need two ears. If you have a hearing loss in each ear that could benefit from hearing aids you should wear two hearing aids. Wearing hearing aids bilaterally (in each ear) will improve your ability to hear in noisy settings, allow you to localize sounds in your environment, improve the ability to understand speech and give sound a fuller quality.
Over 60% of individuals who wear hearing aids are fit binaurally. The benefits of wearing two hearing aids are enhanced ability to (a) hear better in the presence of background noise, (b) determine where sound is coming from, and (c) hear soft sounds at lower levels.