For millennia our hearing has acted as our early warning system. It worked well out in the relative silence of nature: a bird calling out against a predator; the snap of a twig in a deep forest, and so on. But what about in our noisy cities? In a way, this primal sensitivity to noise can turn against us in our industrial, urban soundscapes and cause low level stress, confusion and exhaustion. Our host, Tim Hinman dips his head into the clamour of the Big Smoke, speaks with Cathy Fitzgerald, Colin Black, BJ Nilsen and others, and investigates how we can learn to listen to, and even embrace all this noise.