To make a soundproof room, you should use materials that absorb sound rather than reflect it. Absorptive materials dissipate the sound waves and prevent them from bouncing off surfaces and creating echoes or reverberations. Materials such as acoustic foam, fiberglass insulation, fabric panels, and soundproof curtains are good choices for reducing noise in a room. Reflective materials, on the other hand, can actually amplify sound and make a room noisier.
