1st of all I believe they need to learn to train their dog!! Secondly, if you are going to try and remedy it by the “soundproof kennel” idea, try the soundproof panels they make for recording studios. try any online music instrument store. Less expensive are eggcrates (like from eggs for breakfast) and old mattresses. Layers of a mattress, then plywood or cardboard then eggcrates, then whatever. should help.