Anthropocene noise
Anthropogenic Noise on the Range
Painted Bunting interrupted by aircraft noise.
Anthropogenic Noise interrupts Painted Bunting
The above image is a spectrogram of a Painted Bunting (the evenly spaced vertical squiggles) that was interrupted by engine noise from an aircraft overhead. The ripples are the aircraft - the frequencies get higher as the aircraft approaches. When the frequencies get up into the range of the bunting call he stops calling, until they subside as the aircraft gets further away.