The types of aircraft soundproofing materials engineers use will vary according to the size of the aircraft, the goals of the aircraft cabin soundproofing project and other factors, including cost and the amount of time allotted the engineers for soundproofing for airplane cabins. However, they’ll typically go about soundproofing airplane cabins by laying down specially designed soundproofing material anywhere sound is likely to transmit through the cabin. One of the best materials for soundproofing airplane cabins is a fiberglass composite, like the Quiet Barrier Fiberglass Composite offered by Soundproof Cow. This soundproof barrier is specially designed to resist high levels of heat, while also blocking high-frequency sound.