This presentation explains how sound travels through building assemblies and how uncontrolled air movement is a primary pathway for sound transmission. Participants will examine how the proper installation of building materials, such as firestop systems and air barriers, helps restore and maintain Sound Transmission Class (STC) performance by limiting air and smoke movement through penetrations and joints. Because smoke travels on air, materials designed to contain fire and smoke also play a critical role in mitigating sound transmission. Through real-world examples, attendees will connect life-safety requirements with acoustic performance in wall and floor assemblies.
Learning Objectives
- Analyze how sound travels through building assemblies, and identify primary transmission paths related to air movement.
- Differentiate between laboratory STC ratings and real-world acoustic performance in penetrated and jointed assemblies.
- Examine how improper or missing firestopping and air-barrier continuity affect both sound transmission and smoke migration.
- Evaluate how specific firestop materials and installation methods influence the restoration of STC performance in rated assemblies.