Acoustical Performance Durham NC
2008 Guildmaster, 2010 Guildmaster with Distinction
Custom Builders USA, National Association of Home Builders, Triangle Builders Guild
Foundation Repair, Waterproofing, Crawl Space Encapsulation
BBB, Helical Pile World
Chapel Hill, NC
Source: Masonry Construction
Publication date: October 1, 1995
By Christine A. SubasicAbstract: To understand why some building spaces are acoustically better than others--and specifically how masonry can be used to limit or enhance sound transmission--designers must first understand how sound is transmitted from one building space to another. When sound strikes a wall, some of it is reflected, some absorbed, and some transmitted, depending on the materials and construction of the wall assembly. Acoustic performance of a wall assembly is characterized by either an STC (sound transmission class) rating or an NRC (noise reduction coefficient) rating. The STC of a wall assembly is a measure of its resistance to sound transmission or its ability to insulate a building space from sound on the opposite side. The NRC characterizes an assembly's ability to absorb sound. Sound absorption is important in determining how sound travels within a building space. In many cases where masonry is used for ease of maintenance and other reasons, acoustical performance also is a concern. Although acoustical characteristics may be overlooked as a particular advantage, the use of masonry walls in restrooms, kitchens, hallways, and other high-noise areas insulates surrounding spaces from unwanted noise.
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