STC (Sound Transmission Class) ratings are an established way to average how much sound is stopped by something. STC ratings are used for windows, doors, walls and most building materials. The STC rating is the average amount of noise stopped at 18 different frequencies, measured in decibels. STC ratings are a logarithmic scale similar to the earthquake Richter Scale, which means each number is significantly higher than the one before.
The STC Ratings for double paned windows usually vary from 26 to 33. Soundproof Windows STC ratings range from 48 to 54, which varies depending on the existing window and the air space. Over a single-paned window in a standard wall, the STC rating is 48. Over double paned windows, the STC rating is 48 or more. With increases of air space, figures greater than 50 are easily achieved.
Soundproofing windows are highly effective noise reducing windows. Tests in and out of the lab show that our windows are ten times better than dual paned windows and reduce sound levels in your home by 75 to 95 percent.
For more information about our soundproofing products and services, contact Soundproof Windows today.