Another surprising discovery. It reminds me of some research I heard about lately, where scientist tried to find out, how frogs manage to locate a certain other frog inside the noise mayhem that they collectively produce sometimes. They can single out and locate a individual other frog calling, even if there are thousands of frogs - of the same species and other species - around them being incredibly noisy (and some frogs can make extremely loud sounds compared to their size). Its as if we would sit in a full football stadium and can hear what a person on the opposite side of the stadium is shouting, when the whole crowd is shouting out. And you could tell exactly who it is that you hear.
They have some ideas how this may work, but nothing confirmed. Its hoped, that this skill could be adapted to technical use later, for example to build better hearing aids for people. Those could then be able to "concentrate" on certain sounds or voices while suppressing others, instead of amplifying all sound input equally as they do now.