Two-ear hearing (called "binaural") is better than one. If you have hearing loss in only one ear, you may be fine with one hearing aid. Age and noise-related hearing loss tend to affect both ears, but your hearing profile for each ear is probably different. If there is a loss in both ears, you will probably benefit more with a binaural solution. Today, about two-thirds of new users opt for dual hearing aids, and as a group they report a higher level of satisfaction than purchasers of a single hearing aid.