STC

Definition

STC (Sound Transmission Class) is a rating that measures the ability of a building material or assembly to reduce sound transmission.

Purpose

The purpose of the STC rating is to quantify the effectiveness of walls, floors, ceilings, and other assemblies in blocking sound, helping to design quieter indoor environments.

Examples of Use

• Residential buildings use high STC-rated materials for walls and floors to reduce noise between units.
• Office buildings employ STC-rated partitions to create private and quiet workspaces.
• Hotels use STC-rated doors and walls to ensure guest comfort by minimizing sound transmission.

Related Terms

• Noise Reduction Coefficient (NRC): A measure of how much sound a material absorbs.
• Acoustics: The science of sound, including its production, transmission, and effects.
• Soundproofing: Techniques used to prevent sound from entering or leaving a space.

Notes

STC ratings are essential for achieving desired acoustic performance in buildings, guiding the selection of materials and construction methods to reduce noise and improve occupant comfort.