The phrase "ambient effects" refers to the subtle sounds or visual elements in an environment that create a specific atmosphere or mood. Full definition
Quite a lot of ambient effects cropped up in the sides, and the music showed nice stereo separation as well. (dvdmg.com)
The soundtrack and ambient effects really bring it home, with soft background music shifting from serene to tense as you move about. (stevivor.com)
The film has a nice sound design and this track is filled with good stereo and surround effects, many from crowd scenes, but there are some nice ambient effects as well. (jackasscritics.com)