One is less than half

Contrary to popular belief, one ear working less effectively than the other can have a significant impact on daily life. Hearing with one ear is like trying to see with one eye, it's possible but not as effective. That's why people do not tend to wear monocles anymore. They became obsolete when eye specialists discovered the importance of balanced vision. Improving the hearing in one ear whilst the other remains impaired causes problems with loudness, clarity and auditory depth.