STC vs OITC
Learn the key differences between Sound Transmission Class and Outdoor-Indoor Transmission Class to determine the best sound rating for your next project.
When evaluating soundproofing materials, two key metrics are used: OITC (Outdoor-Indoor Transmission Class) and STC ( Sound Transmission Class). Both measure how well a building element (like walls, windows, or doors) blocks sound , but they assess different frequency ranges and real-world conditions.
OITC Rating Guide
OITC Rating vs STC Rating Sound Transmission Class ( STC ) ratings and OITC ratings both rate the effectiveness of an assembly to attenuate airborne sound . The ASTM E90 standard is used for measuring both, and the same types of products are rated using the same numerical rating scale.
OITC vs STC Ratings
OITC and STC measure different frequencies. Learn which rating applies to your project and how to choose soundproofing products accordingly.
STC vs OITC explained: how each rating is tested, when to spec it, and why OITC is essential for windows and exterior facades.
OITC vs STC Which Rating for Outdoor Noise Insulation
OITC vs STC explained: why STC underestimates outdoor noise insulation performance, OITC methodology per ASTM E1332, frequency weighting differences , and when to specify each rating.
Moving forward, it's essential to keep these visual contexts in mind when discussing Stc Vs Oitc Key Differences And Reducing Airborne Sound.
The Difference Between STC and OITC Professionals have been using the STC rating System to measure sound transmission for decades. Originally used to evaluate transmission through interior walls only, today STC is used to assess almost all types of barriers: exterior walls, interior walls, Windows, and doors. Developed in 1990, the OITC rating System was designed to measure the transmission of ...
STC vs. OITC Ratings
Unlike STC , OITC was engineered specifically to measure how well exterior walls, doors, and windows block low-frequency, high-energy transportation noise. In a laboratory, OITC tests measure sound absorption down to 80 Hz. This lower frequency range is critical because exterior noise behaves entirely differently than interior noise.
Additional Notes on Stc Vs Oitc Key Differences And Reducing Airborne Sound
airborne sound. For Stc Vs Oitc Key Differences And Reducing Airborne Sound, this point helps readers notice the most relevant visual details before moving into the gallery.
Comparing Structure Borne And Airborne Sound Transmission Differences. This note connects the source idea with the visuals in a simple, reader-friendly way.
Noise Control Using Insulation How to Select the Correct Materials. The extra context helps the page feel more useful without forcing the same phrase repeatedly.
