Segmentation by type categorises Noise Reduction Carpet Underlay into Foam, Rubber, Felt, Cork, and Hybrid variants. Foam underlays, typically made from polyethylene or polyurethane, capture the largest share due to low cost and ease of installation, though their acoustic performance is moderate. Rubber underlays, derived from recycled or virgin elastomers, command a higher price point but deliver superior impact noise reduction and durability, appealing to commercial and institutional projects. Felt underlays, produced from compressed fibers, offer balanced sound absorption and thermal insulation, making them a preferred choice for residential upgrades. Cork underlays provide natural, sustainable solutions with excellent vibration dampening, yet their market penetration remains limited by higher material costs. Hybrid systems combine two or more materials—such as foam‑rubber laminates—to optimise performance across frequency ranges, targeting niche applications where customized acoustic solutions are required.