A number of years ago, I toyed with the idea of putting high-quality speakers on the chair suspended at head level. This would keep the volume low enough to not be heard across the room but avoid the discomfort of audiophile-class headphones.

You need to use “speakers”, but do not the music to be heard by co-workers: That is not a contradiction, but could itself be doable.

A number of years ago, I toyed with the idea of putting high-quality speakers on the chair suspended at head level. This would keep the volume low enough to not be heard across the room but avoid the discomfort of audiophile-class headphones.