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.

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.

These materials are used to add mass to walls, floors, and ceilings to stop noise transmission between rooms. Acoustimac Mass Loaded Vinyl Soundproofing Barrier $110.95$188 Acoustimac Go to product viewer dialog for this item.