An environmentally friendly underlayment for ceramic tile, hardwood, and laminate floors that reduces sound transmission to rooms below. It has an STC rating of 70 and an IIC rating of 74. Available at Home Depot for ~$60.
A dense, 1/8" thick rubber-like membrane that adds critical mass to walls and ceilings without significant bulk. It is effective at blocking frequencies from 4000 Hz down to 125 Hz. Available at Acoustimac for ~$110.95 (originally ~~~$187.87~~~). QEP Thick Natural Cork Sound Dampening Underlayment Sheets Home Depot& more Go to product viewer dialog for this item. buy soundproofing material
These porous materials improve sound quality by preventing sound waves from bouncing off hard surfaces. Go to product viewer dialog for this item. Acoustimac Mass Loaded Vinyl Soundproofing Barrier A dense, 1/8" thick rubber-like membrane that adds