What is a soundscape in drama?

there are many types of soundscapes!
It is one of the non realistic conventions in drama. Say, for example, in real life you wouldn't hear voices chanting through a room (this could be a type of soundscaping), this is what makes it non realistic. It can be used to add to mood, tension and other elements of drama. As some one else said, there are many different types of soundscapes because there are many different sounds. In a play I am studying there is the noise of a train that is projected, yet in the play there is only a girl pretending to be on a train. The noise of the train was a soundscape.