Sound Absorption Sheets are not a sound blocking product, but a sound absorption product designed to improve the sound quality within a room by absorbing sound echoes and reverberation.Audimute sheets and panels are composed of eco-C-tex®, which is Audimute's eco-friendly sound absorption material that is effective, non-toxic, and requires less energy to produce than traditional fiberglass and foam acoustic products.Great for use in studios, vocal booths, drum rooms, home offices, home theaters, conference rooms, apartments, condos and many other areas where sound absorption is essential to controlling noise.Made in the USA0.85 NRC Rating - Absorbs an average of 85% of sound waves that contact the sheetMeasures 95" x 54" (8' x 4.5') and has an approximate weight of 10 lbsEach sheet contains (3) metal grommets on both 54" sides and includes (3) Quick Hanging Knob and Screws for easy installationEach order contains 1 sheetVolume Discounts - Purchase at least 4 for 4% off, 12 for 8% off, and 25 for 12% offMore than one sheet is typically needed to achieve the desired result. The number of sheets needed really depends on the size of the space being treated. For optimal results, the sheets should be installed over areas where the majority of sound is being reflected.If you are seeking to block sound from entering or exiting a space, then we recommend considering our effective sound barrier products:Audimute isolé® Sound Barrier and Absorption SheetAudimute Acoustic Door Seal KitAudimute Peacemaker®To view our products and learn more about sound and Audimute, select the "Audimute" link by the product title at the top of the page.Please do not hesitate to contact us for personalized sound advice before making a purchase. We are passionate about solving your sound issue.