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Going to be working with deadener for the first time tonight
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<blockquote data-quote="keep_hope_alive" data-source="post: 7383493" data-attributes="member: 576029"><p>. One full layer is waaayyy more effective than 25%. Two full layers is more effective than one. A simple knock test can prove it to you. The mfr follows ASTM guidelines for tapping test when determining the amountof factory damping. In acoustics we also used tapping tests as well as accelerometers.</p><p></p><p>Simply rap you knuckles on the outer panel, listen to the difference as you add layers and compare to an untreated panel. resonance is clearly heard.</p><p></p><p>I apply layers until the panel sounds the way I want it to. Some areas don't need a full layer. Some need several. Depends on the size and thickness of the panel.</p></blockquote><p></p>
[QUOTE="keep_hope_alive, post: 7383493, member: 576029"] . One full layer is waaayyy more effective than 25%. Two full layers is more effective than one. A simple knock test can prove it to you. The mfr follows ASTM guidelines for tapping test when determining the amountof factory damping. In acoustics we also used tapping tests as well as accelerometers. Simply rap you knuckles on the outer panel, listen to the difference as you add layers and compare to an untreated panel. resonance is clearly heard. I apply layers until the panel sounds the way I want it to. Some areas don't need a full layer. Some need several. Depends on the size and thickness of the panel. [/QUOTE]
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Going to be working with deadener for the first time tonight
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