triangles wall decor soundproofing material texture, background

absorbent absorber absorbing abstract acoustic acoustical audio background close decor decoration decorative design details echo foam geometric geometry gray grey grid insulation interior isolation material music musical noise padding paralon pattern polyurethane porolon professional protection protector pyramid record recording resonance room rubber shape silence soft sound soundproof soundproofing sponge structure studio subwoofer texture textured triangles wall wallpaper