In the remote backcountry of Yosemite National Park, aircraft are audible 70 percent of the time

In the remote backcountry of Yosemite National Park, aircraft are audible 70 percent of the time, raising ambient noise levels by about 5 decibels. That’s enough to reduce the distance at which prey species can hear a predator approaching by 45 percent. Lab experiments show that when female gray tree frogs hear traffic noise, it takes them longer to find males who are calling to mate, if they can find them at all.

The Nature Fix: Why Nature Makes Us Happier, Healthier, and More Creative by Florence Williams

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