I work in a cubicle environment. It's okay that we wear headphones, but after wearing them all day it can get uncomfortable. In addition, occasionally I have to leave my desk and/or hear when someone approaches my cubicle and knocks. The status quo is fine, but I'd love to have a way to modify (or get?) speakers that can be heard clearly by me at a short range (2' or closer even) without being audible to coworkers.
Any ideas on how I could make / get a speaker enclosure or something to accomplish this?