<p>I remember listening to “From the Top” (radio program of young classical musicians), and one performer said his dad completely covered the walls with mattresses because he couldn’t stand the noise. Probably a little extreme…</p>
<p>Engineer husband says your egg-crate idea is probably most effective, but the pits in terms of decorating, and that you would (as you said) have to cover the windows. He said drums are problem because of low frequency – normal stuff doesn’t work as well. But anything on walls will help. Such as carpet. Or rubber. In addition to covering the walls, he suggests heavy curtains with rubber lining for windows. Said for low frequency, density is important.</p>
<p>H says as an added note, if you completely deaden your son’s room, you’ll help save his ears from hearing loss, too.</p>
<p>He also suggests looking at this website from E-A-R:
<a href=“http://www.earsc.com/HOME/products/index.asp?SID=5[/url]”>http://www.earsc.com/HOME/products/index.asp?SID=5</a></p>