When a habitat is disturbed, for example by logging, animals that settle there meet unfamiliar vocal competitors whose sounds mask their mating songs. Birds that fail to find free bandwidth fail to breed. Extra noise also upsets the delicate balance between predator and prey, because so much survival depends on hearing.
Animals use the same tactics engineers use to push a signal through noise. Penguins repeat their calls more often as wind noise rises, in direct proportion to wind speed. City birds sing louder and at a higher pitch to rise above human noise.
An animal's sounds are constrained by the anatomy that makes them, not only by what it would be useful to say. Birds with larger beaks sing simpler songs because their muscles cannot move the heavy beak fast enough for the rapid modulations that small-beaked birds produce.
In a natural soundscape, each species evolves to place its calls in an unoccupied slot of pitch and timing so its own kind can hear it. Evolution is a contest for bandwidth as well as for food and space, and a species that cannot find a sonic niche of its own will not survive. The result sounds like a finely tuned orchestra, but competition, not cooperation, is what arranges it.
The combined sound of all the creatures living in a place is unique to it; nowhere in nature sounds exactly like anywhere else. Every organism has its own acoustic signature, so listening to a habitat can tell you what lives there and how intact it is.