If the hearing loss is in both ears, in most cases it is best to wear two hearing aids. We have two ears for a reason. Our brains are wired to process sound from both ears. Two hearing aids restore stereophonic hearing, making speech clearer. Sound localization, or the ability to determine the direction of the sound can only be accomplished by using two hearing aids. Finally, the use of two hearing aids prevents the occurrence of auditory deprivation. A condition that occurs when a lack of sound stimulation from the unaided ear causes the brain to lose the ability to process sound information.