Design Engineering Boom Mat Acoustic Tiles reduce unwanted vehicle noise while providing a clean, finished interior surface. Each 432 x 457mm sheet combines a 1.75mm dense butyl acoustic barrier with a 7mm felt liner, using layered sound damping technology to absorb vibration and block airborne noise in a single 0.72kg panel.Review the key features of these acoustic tiles:1.75mm Dense Butyl Acoustic Barrier: A high-mass butyl rubber layer engineered to damp panel resonance and convert vibration into low-level heat reduces structure-borne noise through doors, floors and bulkheads, resulting in a quieter cabin with less vibration transfer.7mm Felt Liner Layer: A bonded acoustic felt surface absorbs airborne sound waves and reduces reflected noise within the cabin, helping you achieve improved sound control and a more controlled interior environment.Layered Damping Construction: The combined butyl and felt design integrates mass loading and sound absorption in one sheet, allowing you to m