Nov 30, 2025 · When people are evaluating building materials and acoustical products for sound reduction, they rely on the sound transmission class or STC rating of the product.

Sound Transmission Class (STC) is an integer rating of how well a building partition attenuates airborne sound. In the US, it is widely used to rate interior partitions, ceilings, floors, doors, windows and …

Below are the STC ratings of various wall assemblies, each presented to help illustrate concepts, improvements and rules of thumb. The estimated ratings are based on laboratory test results from …

Jan 5, 2025 · STC ratings help architects and engineers evaluate how effectively walls and partitions reduce noise transfer. Use the chart below to identify assemblies that meet specific performance …

Nov 26, 2025 · Learn what STC rating (Sound Transmission Class) means for walls, windows, doors, and floors. Discover how to read STC charts, meet building code requirements, boost soundproofing, …

Oct 10, 2025 · STC stands for Sound Transmission Class. It is a rating system that classifies the airborne sound isolation provided by a building element/partition. Simply put, STC is a single-number …

The Sound Transmission Class (STC) rating shows how well a building partition blocks airborne sound. It’s key for architects, builders, and homeowners wanting better sound comfort in buildings.

STC stands for Sound Transmission Class, a standardized system used to measure the effectiveness of a material in blocking sound. Essentially, the higher the STC rating, the better a wall, floor, or ceiling …

Sound Transmission Class (STC) is a single number that describes the ability of a building material or partition to block airborne sound. STC is a laboratory test result defined by ASTM E413 for sound …

This comprehensive article will not only explain what STC is but will also provide the STC ratings of common materials and discuss the complex process of determining which of these materials will best …