Basically, if you have two ears with hearing loss, and if both ears could benefit from hearing aids, you need dual hearing aids or binaural hearing aids. If you try to amplify sound in only one ear, you cannot expect to do very well. There are many advantages associated with binaural (two ear) listening and importantly, there are problems associated with wearing only one hearing aid.
You can hear better in background noise with two hearing aids versus one hearing aid. Two hearing aids enable you to tell which drection sounds are coming from.Localization (knowing where the sound came from) is only possible with two ears and it is just about impossible with one ear. Localization is not just a sound quality issue; it may also be a safety issue.
