I'm currently planning on converting a basement into a school. It will have adjoining classrooms that need be very well sound insulated and also a reverberation problem that needs addressed.
Having had a builder quote for the work I was surprised at its price. He advised that to sound insulate adjoining rooms we should include acoustic blanket to prevent vibration travelling into and along the cement ceiling and subsequently noise entering neighbouring rooms. Also that this would solve the reverberation problem. Additionally he advises that we insulate the existing perimeter walls for the same reason.
The builder is reputable and was recommended by a family friend. He apparently has extensive experience in commercial and domestic projects. I don't really have a reason to doubt him but:
Is insulation of existing perimeter walls and ceilings more effective in insulating adjoining rooms?