Quote: This will sound silly, but pressing coarse sand into tacky undercoat and then spraying another layer can make a big difference. Each grain of sand acts as its own little heat engine, converting the mechanical energy to heat. Ummm, don't ever get me started on speaker enclosures.

Something else that is quick and efficient, is th light gray stick on anti skid material. Not the stuff that feels like sandpaper, but kinda rubbery. It has yielded stunning results for me. In addition to its resonance damping properties, its rough texture provides a multitude of points for sound waves to launch themselves into space, rather than traveling to an edge and being much stronger.

Stainless sink manufacturers use litte stick on patches that do a wonderful job in damping garbage disposal noise. They also dampen spurious resonances in CD players. Unquote

Is a motorhome like a huge speaker enclosure??
And if you assume that it is
what is the best way to achieve the best quality of sound ~~ or rather the best quality of silence???