A Recipe Book For the Coolest DIY Projects You Never Knew How To Do Kelsey Campbell-Dollaghan1/14/15 5:00pm24EditPromoteGo to permalinkBuilding an anechoic chamber. Mapping the Wi-Fi in your building. Listening to the Earth with piezo microphones. These are all fascinating projects, and we've featured artists and engineers who have done them here on Giz before. But now, there's a book in which they explain how.