Overall sounds produced by the diegetic world, usually perceived as background sound.
Soundscape
Characteristic types of sound heard in a given environment at a given time.
Room tone
Raw atmosphere sound of a room, including electrical hums, traffic background, weather sound, etc…
On the air
Sound transmitted by Tvs, radios, etc in film space with no subject to the natural law of sound propagation.
Extension
Spatial dimension of the filmic sound
Establishing sound
Sound that establishes, from the very beginning of a scene, the general character of the surrounding
E.A.S.
E.A.S. or Elements of Auditory Settings refer to the punctual sound residing in the ambient sounds.