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AcoustiPack ULTIMATE contains both 2- and 3-layered acoustic materials. Comparative small and large scale acoustic tests with alternative single-layer PC sound-proofing materials demonstrate that AcoustiPack multi-layer materials are more effective and safer, whilst still remaining as thin as possible.
2 Layer Materials
The upper layer, immediately opposite the noise source, is a layer of semi-open cell dense acoustic foam which provides a low-reflection surface. This upper layer of foam provides some sound attenuation, especially of higher-frequency sound (>1 kHz). The very dense black limp 'plastic' layer at the base of the 2-layer material is directly attached to the substrate. This layer acts as both an acoustic barrier (effectively attenuating the transmission of sound energy through the material) and as a damping layer, reducing vibration in the substrate (usually a thin steel panel in many PCs and server enclosures).
3 Layer Materials
In our latest generation of 3-layer composite (Patent Pending), the dense acoustic barrier layer has been 'suspended' away from the substrate in the centre of the acoustic foam. The construction layering is like this: (noise source) acoustic foam -> acoustic barrier -> acoustic foam (then the substrate, which is usually a metal sheet panel).
Fitting recommendations are supplied in the User Instructions with the pack, and are available for download here: AcoustiPack™ User Instructions (90Kb)!
You may also like to consider adding AcoustiPack™ EXTRA Foam Blocks (APExtB) to this kit. This will increase the internal surface area of the acoustic materials, and help to absorb extra acoustic energy inside the PC or server case More Details or simply add to your order in the options below!