All musicians of any kind can benefit from developing his or her ear. Some people are born with a better ear than others, of course, but those of us who don’t have a great natural ear can still improve a lot through the use of ear-training drills.
One drill that is useful is to have a friend or relative play various intervals on the keyboard — start with 2nds, then 3rds, then 4ths, 5ths, 6ths, 7ths, etc. — and see if you can identify them. By doing this just a few minutes a day most people can improve their musical ear signaficantly.
Another drill is to have someone play chords of various sorts on the keyboard, and see if you can identify them . Start with the easy ones like major and minor, and gradually work up to augmented and diminished chords, then 6ths and minor 6th chords, and so on. If you don’t have a teacher or someone to help you, you can take online courses in ear-training such as the ones at http://www.playpianocatalog.com/eartrco.html