The latest NASA ScienceCast is titled The Sounds of Interstellar Space:

For more about space “sounds” see the Natural Radio subsection of  HobbySpace Radio. See also the Natural Space Music section, which offers resources for music created in combination with space radio sounds. Prof. Don Gurnett, who is mentioned in the above video, has had his recordings of space sounds included in a number of works such as the Terry Riley composition titled Sun Rings .