This glossary includes more than 300 solar terms, as well as hundreds of additional sustainable design and construction terms.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z AllDefinition: A single-number rating designed to provide a comparison between the noise losses of different structures for building-design purposes. The STC is calculated from the noise reduction at the 16 one-third octave bands between 125 and 4,000 Hertz. The American Society for Testing and Materials has published a standard, ASTM E413-73, "Standard Classification for Determination of Sound Transmission Class."