>However, to block airborne vibrations, don't use foam. Air passes right >through it. Use dense materials with lots of weight to them. Heavy felt >(REALLY heavy) is ideal. Think in terms of that stuff they use under the >carpets of cars. Heavy carpet is perhaps a more cosmetic solution. > >To keep a solid surface (e.g. a wall) from vibrating in response to airborne >sound, add mass to reduce its compliance. Lead sheeting is widely used for this. Ron N
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