I work in a downstairs office in an octagonal building made entirely of brick. There is an open floor plan to the second floor by way of a balcony overlooking the first floor. I ALWAYS keep my doors open (I have 3) to my office [I am an open door policy kind of guy] and speakers situated throughout the office. So my sound filters out constantly out into the hall and then through the building. I all the many years I have been listening to Pandora in my office with all doors open, I have received at least a half dozen complaints... as to what happened to the great music and why did you turn it off. So I have essentially become the building's musical DJ, and have NEVER ONCE got a complaint to turn the music down.