There are myriad examples involving weakly-coupled oscillators in many aspects of the natural world. There are many examples applied to musical instruments, acoustics, and engineering. Weakly coupled ...There are myriad examples involving weakly-coupled oscillators in many aspects of the natural world. There are many examples applied to musical instruments, acoustics, and engineering. Weakly coupled oscillators are a dominant theme throughout biology as illustrated by congregations of synchronously flashing fireflies, crickets that chirp in unison, an audience clapping at the end of a performance.