This presentation introduces the concepts of mitigating unwanted noise using concrete masonry assemblies and systems. Topics covered include a basic review of sound and noise, what requirements are mandated by building codes to address sound control, how to determine the sound transmission class and inside-outside transmission classification of building assemblies, noise reduction coefficients, and proper methods of detailing concrete masonry systems to maximize its effectiveness as a sound barrier.
(43 slides – 1 hr. LU/HSW)
- Common sources of internally- and externally-generated sounds and code minimum requirements for mitigating unwanted noise.
- Standardized means of calculating the sound transmission class (STC) and outside-inside transmission classification (OITC) of concrete masonry assemblies.
- Reflected versus absorbed sound and the role of the noise reduction coefficient in concrete masonry design.
- Appropriate layout and detailing options for maximizing sound reduction within buildings for optimum user comfort.
Keywords: concrete masonry, sound control, sound transmission class (STC), outside-inside transmission class (OITC), International Building Code, ASHRAE 189.1, sustainability, noise reduction coefficient (NRC), detailing, building layout