In this video tutorial episode of Weekend Projects with Kipkay, you'll learn how to build a pair of binaural stealth microphones. Make a set of sneaky earbuds that record what you hear. They create a binaural effect when played back wearing headphones.
Check out the original article in Make, Volume 17.
Oh... and if you're working from home these days, be sure to check out Gadget Hacks' Working-From-Home Essentials.