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Which soundproofing products actually work?
(lemmy.zip)
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this post was submitted on 11 Jul 2026
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You forgot impedance layers and intentionally making them mismatch, which causes considerable energy loss between them without necessarily having to rely on a lot of mass.
Wood > low density foam > wood causes a ton of reflection.
Wood > pliable/stretchy rubber > wood causes a lot of sound energy to turn into deformation forces on the rubber, converting it to heat.
I didn't forget, I just lumped those under "mass" for simplicity because that's what they are, masses. Sure they work more effectively through the mix of materials but like I said, they can engineer a soundproof room in a room if they want but that's beyond the scope of a simple comment. Two layers of wood like you have in both examples is a not inconsequential amount of mass.
Also need to be careful with any design because the triple leaf effect is real and weird and doing layers like that inside a room might not have the desired effect, especially if they overlook coupling to the floor/ceiling and just created a drum instead of a dampener.