Ah! I get it now. That's so much clearer than the previous post I believe the pump and fan will vibrate and I don't wish my radiator to vibrate as well, since it would amplify the sound. Am I right to say that? Therefore I think the gel-stuff would help dampen the noise by a small amount. As for mas...

Thank you very much for your reply! What I still don't get is this: There is mass loading to increase the amount of mass the sound energy must penetrate. You do this to try and keep noise inside the box. There is diffusion to break up the moving air of a sound wave. You do this to soften how sound w...

Is this correct? Let me follow this up as I understand it: There are 3 separate things often referred to as 'dampening' There is the actual dampening of the case panels to deaden their vibrations. You do this if your case panels are audibly vibrating. There is mass loading to increase the amount of ...

Great guide!