Abstract: Means providing a sound trap along one edge of a sliding panel and comprising a pair of substantially parallel and transversely spaced-apart wall members extending longitudinally from a panel stop. The space between wall members, in turn, provides a transverse gap spacing between the panel and each wall member, the longitudinal extension of said wall members from the stop being approximately two and one-half times the transverse gap spacing between the panel and the wall members. The sound trap thus provided allows the panel to be moved from a position of closure against the stop to a position that provides a gap distance opening between wall members with an overlap one and one-half times the gap spacing.

Abstract: A sound barrier is provided for use in front of a building opening, such as a sliding or inwardly hinged window. The sound barrier comprises a substantially planar panel and a frame formed with elongate members, each member having a channel opening. A barrier member mounted circumferentially of the building opening is received within the channel opening of each frame member but in spaced relation thereto. The barrier member cooperates with the frame and the combination defines a tortuous passageway that permits the passage of air but interferes with the transmission of sound.