One frog species finds a solution to the cocktail party problem

A mechanism in the lungs of tree frogs helps filter incoming noise and other amphibian sounds from the calls of their own species. When people attend large, noisy gatherings, hearing a conversation is often difficult. The so-called cocktail party problem also affects the green tree frog (pictured in figure 1) and other frogs in habitats teeming with the sounds of various animals and with anthropogenic sources of noise.