Abstract
There exists a large variation in laboratory sound transmission loss (STL) results and calculated STL-based ratings. Multiple research studies have found that this laboratory variation is consistent over multiple test series and assemblies, but more especially for steel-framed assembly designs. A previous research study presented at the Acoustical Society of America illustrated and quantified the STL difference for various steel mil thicknesses from 15-mil nonstructural to 97-mil structural. This research study is the second phase of this steel-framed STL research study and it investigates stud spacing and steel material- and shape-characteristics. The effect that each of these properties has on the STL of steel-framed partitions will be illustrated and discussed.
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