Noise Cancelling Headphones seem almost too good to be true. A product that can block out all sound and give you complete audio silence seems crazy. They're also usually kinda pricey, so it's a little bit of a risk when you're unsure if they actually work. I've been using a range of noise cancelling headphones for years. Here, I'll talk about why they were founded, what they can do, what they can't do and why you might think about picking up a pair.