If you’ve ever spent a warm summer night on a pond, you’ve undoubtedly heard a chorus of frogs searching for mates. But understanding how these calls work and what makes them attractive can be difficult in that environment. Dr. Gerlinde Höbel wanted to create a space where she could study the Eastern Gray tree frog without that distraction. So she and her students created the ideal environment by converting a commercial freezer into a sound proof room with a small frog arena.