What we hear and the way we hear it has everything to do with who we are, where we are, what we are, what we can see and feel and what we know about the world around us, because we grew up in it. We take hearing for granted unless, of course, you were born deaf and never heard anything – just like Jo Milne, our guest in this episode of Sound Matters. Milne was deaf until she was forty years old when she had cochlear implants, an experience that was recorded and uploaded to YouTube. Tim Hinman visits Milne a year after she first heard the world, as well as visiting a reverb chamber and an anechoic room with Finn Agerkvist of the Danish Technical University to find out what hearing nothing might sound like.