Thank you for viewing our products. [New, Unopened] Sound Absorbing Board Felt Board *Double-sided tape sold separately It has a sound-absorbing effect depending on the thickness, reducing noise. - Product Name: Sound Absorbing Board - Set Contents: 12 sheets x 3 sets (36 sheets) - Board Type: Felt Board - Sound Absorption Effect: Sound absorption effect depending on thickness [High Density and Excellent Sound Absorption Effect Due to Thickness] The sound-absorbing board is 9mm thick and, combined with a high density of 230kg/m3, has an average sound absorption rate of 88% in the high-frequency range, which is higher than soundproof sheets of the same thickness. It also has an 80% sound absorption effect in the mid-range and a 39% sound absorption effect in the low-frequency range "0Hz~250Hz". [Usable in Various Places] It can make the office quieter and make audio recordings clearer. It can also be used in professional studios, rehearsal rooms, concert halls, podcasting, churches, home theaters, vocal booths, home studios, etc. A-5