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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.

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 buy soundproofing material

A viscoelastic damping compound applied between two layers of rigid material (like drywall) that dissipates up to 90% of sound vibrations. It is a highly cost-effective method for soundproofing existing walls and ceilings. Available at Soundproofing Los Angeles . Top Materials for Echo Absorption & Clarity A dense, 1/8" thick rubber-like membrane that adds