It would be great if the soundproofing on the seminar rooms on the 5th floor of the Regenstein could be improved. When there are large classes or when people have conference calls, the noise can be quite disruptive.
If it's any consolation, you are not the first person to note the upper floor seminar rooms are not soundproof.
When we investigated this issue last year, we were told it's possible to soundproof the rooms, but the prices quoted made our hair stand on end (what hair we still possess). Making the rooms soundproof is still on our wish list, but we need to secure special funding first.
In the meantime, please feel free to ask groups using the rooms to keep the noise down -- or if it's a class with a recurring noise problem, let us know and we can speak to the instructor.