Ceiling plenum design: Laboratory testing of ceiling/plenum systems for ceiling attenuation class

Any acoustic testing laboratory that performs the ASTM E1414 testing of ceiling attenuation class ceiling system will have experimented with a few odd cases and learned a few interesting “rules of thumb.” The Armstrong World Industries Acoustic Testing Laboratory in Lancaster, PA, has certainly had its share of those, and has learned a few things about materials and systems along the way. We would like to share these understanding about ceiling materials, grid systems, plenum stuff, etc. Test data…that is what it is all about.