Yeah, I always think I hear something like the phone, a voice, or something. Sometimes the voice turns out to be from my music (especially Floyd, lots of random voices sometimes). Its really annoying sometimes cause for a second I think someone just called me and get real paranoid. And then I convince myself its just the weed, but then I think something like "just cause I'm high doesn't mean that its impossible that I actually did hear that" but within' 1min i forget all about it.