If you want to hear and see what your scene's soundscape sounds like before publishing, be sure to enable both of these from the Options toolbar.
Audio Volumes are volumetric emitters in the shape of spheres and cuboids (boxes) that can cover a larger area with sound than a point emitter. Showing audio volumes shows green outlines that represent the extents of sounds before falloff happens.
For more information on Sansar audio, see our help articles: http://bit.ly/2rr8ab9
And let us know if you have questions and/or curiosities :)