Abstract: An acoustic insulation curtain is composed of a number of long, relatively high mass optically transparent acoustic barrier sheets, having longitudinally extending central portions covered with panels of acoustic absorber material. The adjacent barrier sheets overlap one another. In some embodiments they are mutually spaced and also overlap portions of absorber panels of adjacent sheets. Absorber panels may be vertically discontinuous in a staggered relation from one panel to another to provide a circuitous sound absorbing air flow path from one side of the curtain to the other.

Abstract: An adjustable light and air-admitting thermal and acoustic barrier has a plurality of sound-attenuating blades pivotally mounted in a frame in a mutually spaced, parallel relationship. When the barrier is mounted at an open window, the blades may be adjusted to various open positions to allow desired amounts of outside light and air into a room, but cooperate in such open positions to form an effective sound trap for annoying outside sounds. Each of the blades functions as both a sound absorber and a sound transmission barrier, and comprises an elongated, relatively thin core of solid, sound-reflective material having longitudinally extending edge and intermediate flanges which define cavities on opposite sides of the core. Secured within the cavities by the flanges are strips of sound-absorbing insulating material, the core and insulating material being laterally enfolded by a cover secured to the flanges.

Abstract: An acoustic drape is formed of a continuous plastic barrier sheet upon which panels of acoustic foam are mounted at spaced intervals to define narrow optically transparent hinge sections between the panels. The panels are loosely mounted within sleeves fixed to the sheet to accommodate differences in thermal expansion, and yet are sufficiently confined to provide physical support for the thin plastic barrier sheet.