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how many layers of sound deadener?
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<blockquote data-quote="Anthony Collova" data-source="post: 2600129" data-attributes="member: 558844"><p>With Vibration damping, the more the better.</p><p></p><p>As pointed out, there is a point of deminishing returns.</p><p></p><p>1 Layer of constraint layer damping mat @ .5 lbs. psi is can yield an ALF of .10 or so.</p><p></p><p>Adding a second layer of mat will crank the ALF up to about .27 or so</p><p></p><p>a 3rd layer will get you up to about .33 then .36 and so forth.</p><p></p><p>So 2 or 3 layers is ideal depending on the budget.</p><p></p><p>The more a product weighs and the thicker it is the more it will dampen vibrations too. so a 45 mil product weighing .35 lbs. psi will only yield a .06 rating..</p><p></p><p>The strength of the foil and the viscosity of the adhesive layer all contribute to the range of frequencies that will be most reduced with the product.</p><p></p><p>The more firm the adhesive the lower the frequencies will be killed.</p><p></p><p>Softer butyl or asphalt will dampen high range noise.</p><p></p><p>Hope that helps</p><p></p><p>ANT</p><p></p><p><a href="http://www.secondskinaudio.com" target="_blank">http://www.secondskinaudio.com</a></p></blockquote><p></p>
[QUOTE="Anthony Collova, post: 2600129, member: 558844"] With Vibration damping, the more the better. As pointed out, there is a point of deminishing returns. 1 Layer of constraint layer damping mat @ .5 lbs. psi is can yield an ALF of .10 or so. Adding a second layer of mat will crank the ALF up to about .27 or so a 3rd layer will get you up to about .33 then .36 and so forth. So 2 or 3 layers is ideal depending on the budget. The more a product weighs and the thicker it is the more it will dampen vibrations too. so a 45 mil product weighing .35 lbs. psi will only yield a .06 rating.. The strength of the foil and the viscosity of the adhesive layer all contribute to the range of frequencies that will be most reduced with the product. The more firm the adhesive the lower the frequencies will be killed. Softer butyl or asphalt will dampen high range noise. Hope that helps ANT [URL="http://www.secondskinaudio.com"]http://www.secondskinaudio.com[/URL] [/QUOTE]
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how many layers of sound deadener?
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