Quote: Originally Posted by DanDan The German stuff looks interesting. I wish we could find out more, how they are doing this, particularly the membrane material. Also Armstrong? Link or more info plse? DD Manufactured by Armstrong: Canopy Ceilings by Armstrong Serpentina Soundsoak® Acoustic Walls offer excellent sound absorption (60-90%) and reduce noise transmission between spaces. It’s easy to select the right Soundsoak® acoustical wall. CLASS A-1 ASTM E-84 Noise S.T.O.P.™ “Soundproofing” Foam Composite Material with Mass Loaded Vinyl Noise Barrier Septum Ideally suited to line equipment enclosures. Commonly used to line walls and ceilings of utility or mechanical rooms to absorb and contain the noise source. Use where both sound absorption and noise reduction are needed. Noise S.T.O.P. Bass Buster™ Low Frequency Sound Absorber, NRC 1.37 at 250Hz, .97 at 125 Hz Durable lightweight, high performance low frequency absorbing panel made from recycled cotton. Noise S.T.O.P.™ Anti-Vibe™ Speaker & Drum Mats Blocks Low Frequency Sound and Vibration Noise S.T.O.P.™ Nuetra-Phone™, Soundproof Floor Underlay, Plus High Performance Airborne Noise and Vibration Control E-A-R Specialty Composites Acoustical Solutions offers a large selection of noise barriers and sound control products. AudioSeal™ Drop tile ceiling barrier is a soundproofing material designed to significantly reduce the amount of sound that is carried up and into plenum ceiling areas. Get your doors sealed too. Acoustical door seals are used for soundproofing both new or existing doors.