Great idea that come from Italy, A&G Soluzioni Digitali has create a great application that show you from where come the sounds and also how strong it is (they use circle). This application is for video editing, so you can see what object makes sound (someone falling down) and how strong the sound are, directly on the movie.
This application can also be used for 3D and for games development.
Visit the See’n’Sound Website
By the way, their website is really unfriendly and old designed for a 1 year old website.