The EchoDeco sound dampening tiles will help you create an acoustic balance by reducing reverb and filtering out unwanted noise. They're made from a polyester fiber that absorbs up to 85% of incoming sound and also include removable adhesive strips for easy installation. They are sold in packs of eight with each tile measuring 23.5"x23.5" and you can choose from different color options. Quality backed by a 5-year manufacturer's warranty.