What Is the Sound Absorption Coefficient The sound absorption coefficient quantifies how effectively a surface converts sound energy into heat. Materials with higher coefficients reduce echo and improve speech clarity in offices, schools, and hospitality spaces. It’s one of the key metrics used by architects and acoustic consultants when designing comfortable interior environments optimized for […]

Why STC 40 Matters in Wall Design STC 40 walls provide moderate privacy but still allow normal speech to pass through. In commercial or light industrial applications, this level may be acceptable—but for residential and hospitality projects, it’s the starting point for improvement. Understanding how framing choices affect STC is key to designing stronger and […]

What STC Means in Construction An STC rating (Sound Transmission Class) measures how well a wall, floor, or ceiling assembly blocks airborne sound such as speech, music, or television noise. The higher the number, the better the sound isolation. STC ratings are determined through laboratory testing that measures how much sound energy is lost as […]

What IIC and STC Actually Measure STC and IIC are the two ratings that govern almost every multi-family and hotel acoustic specification in the United States. STC handles airborne sound — voices, music, television, HVAC noise, anything that travels through the air. IIC handles impact sound — footfall, dropped objects, furniture moving, anything that strikes […]