Less Stressful Listening
Listening with only one ear is physically tiring and stressful. The more realistic sound of stereo hearing lets you respond more confidently, and you don't need to always worry about turning your "good ear" toward sounds. 

Safety
Our brain locates a sound source by measuring the tiny differences in duration and intensity between each ear. These differences are then translated by the brain, allowing us to instantaneously recognize a sound's exact location. When a person hears with only one ear, the difficulty in locating sound can be dangerous, especially in traffic.

Both Ears Stay Active
When a hearing impaired person who has an equal hearing loss in each ear wears a hearing aid in only one ear, the unaided ear may tend to lose its ability to hear and understand. 

Cushion Loud Sounds
Binaural hearing generally requires less volume, giving a more natural sound to voices and music. Sudden loud sounds lose much of their jarring effect when divided between the ears.

Better Sound Identification
Many noises which sound almost exactly alike when heard with one ear can be identified more easily when heard with two ears.

Hearing From Both Sides
As nature intended, hearing with two ears allows you to enjoy more natural sound. Hearing with one ear is like trying to see with one eye-it's possible, but not as effective.