Background Sounds

Sounds at a level that is low, relative to the foreground sounds, which are incidental, or which are not required for understanding or appreciation of the program. This would include content such as background music in film, wind noise, and more. Dialogue may be a background sound, for example when it consists of background voices in a public space, a restaurant, theatre, etc. [Source: EBU Wiki - Technical - Louddrafting]