Leaky Noise is a term used to describe a sound that is heard through walls or other barriers. It is usually caused by air passing through small openings or cracks in the barrier. The crossword solutions for Leaky Noise are SISS (4 letters) and SSS (3 letters). SISS stands for Sound Insulation and Soundproofing System, which is a system designed to reduce the amount of sound that passes through walls and other barriers. SSS stands for Sound Suppression System, which is a system designed to reduce the amount of noise that is generated within a space. Both systems are used to reduce the amount of sound that passes through walls and other barriers, making it easier to control the level of sound in a space.