When sound is leaking into or out of a room, doors & windows are quite often the problem. They may not have enough density or mass to block the transmission of airborne sound. Additionally, if not sealed correctly, a 1% opening or gap will allow up to 50% of the sound energy to pass through. To help solve these issues, Acoustical Solutions supplies a variety of door and window accessories to seal air gaps and increase STC (Sound Transmission Loss). We also carry a variety of door seal kits, acoustical doors seals and window seal kits to reduce sound leakage around existing doors or windows. These are available for use in a wide array of public and private spaces including offices, schools, residential, recording studios, and many more.