Obtaining STC ratings that are accurate typically require the assistance of an acoustics consultant. The ratings should be taken directly from laboratory tests and verified by a professional or modeling tool. Designers should be wary of information obtain

Obtaining STC ratings that are accurate typically require the assistance of an acoustics consultant. The ratings should be taken directly from laboratory tests and verified by a professional or modeling tool. Designers should be wary of information obtained from marketing materials (except for window STC from an acoustics window manufacturer, which are generally reliable). An acoustics consultant is the best person to determine the actual STC rating for a partition, especially an atypical one.