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Natural Science Forum / Physics / Acoustics / July 2008Fabrics with acoustical properties
I am looking for fabrics that have both acoustical blocking and absorption properties. I would like to make drapes for some windows to block out a low level of noise. I don't want to use acoustical foam or some such thing. I want a decent-looking fabric. Does anyone know of such fabrics? Thanks in advance. Steve Jacobson > I am looking for fabrics that have both acoustical blocking and absorption > properties. I would like to make drapes for some windows to block out a low [quoted text clipped - 8 lines] > > Steve Jacobson There are no such fabrics. To block out noise you require two factors, mass and rigidity. d >> I am looking for fabrics that have both acoustical blocking and >> absorption >> properties. I would like to make drapes for some windows to block out a >> low >> level of noise (snip...) > There are no such fabrics. To block out noise you require two factors, > mass and rigidity. Not quite. In theory, rigidity is not necessary, and in general it is not even desirable! You do require mass, and it should be impervious to air. But, practical materials that are heavy enough to give a useful amount of sound isolation, are mostly rigid or fairly stiff, and cannot really be used as "drapes". If the noise is very high frequency you might just find something that will make an audible difference, otherwise there's not much chance. Your best bet is secondary glazing.  SignatureTony W My e-mail address has no hyphen - but please don't use it, reply to the group. >>> I am looking for fabrics that have both acoustical blocking and >>> absorption [quoted text clipped - 5 lines] >> There are no such fabrics. To block out noise you require two >> factors, mass and rigidity. Heavy velvet curtains certainly have a measurable effect. You could sew lead or steel discs into them. Ancient technology. Cheers Greg Locock >>>> I am looking for fabrics that have both acoustical blocking and >>>> absorption [quoted text clipped - 13 lines] > > Greg Locock I get the feeling that he wants the effect to be considerable, not measurable. And curtains do essentially nothing at low frequency. d >I am looking for fabrics that have both acoustical blocking and = >absorption [quoted text clipped - 11 lines] > >Steve JacobsonAre the windows sealed double pane ? Are the windows sealed double pane ? |
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