Abstract: Decorative sound absorbing panels 10 and 12 are assembled around furniture. The panels 10 and 12 are secured together at a miter joint 15 by a concealed snap fastener. The snap fastener comprises a male spline 14 having two arms 32 formed at a right angle. Female splines 34 located in adjacent beveled surfaces 16 of the miter, each receiving one arm of the male spline 14.