Third Pod from the Sun: Eavesdropping on the Ocean

In this episode of AGU's podcast, Bob Dziak, head of NOAA PMEL’s acoustics program, describes the sounds scientists study with their underwater microphones, including the noises they’ve heard at the deepest part of the ocean in the Mariana Trench and a mysterious “bloop, and how they use that information to understand natural processes and the impact from human activities.