Surface
Surface of a wood panel typically refers to the outermost layer or facing of the panel, which is the part that is visible and exposed.
Slat
Slats are narrow, elongated strips or blades typically made of materials from wood oak.
Felt
Acoustic felt is a specialized material designed to dampened absorb sound in various applications. It is typically made from natural or synthetic fibers that are tightly packed together to create a dense and porous structure