The Substance of Silence

We all have a pretty good notion of noise, but what exactly is silence? Is it a substance or an absence? Between the mindflaying quiet of soundless rooms to wildlife ambience and white noise machines, what is the ideal balance of silence? In this episode of the Stuff to Blow Your Mind podcast, Robert and Joe look for answers and, yes, also discuss a few sound-sensitive monsters and the likelihood of blowing up a humanoid head with sound.