Why Do Cicadas Make So Much Noise? The Science Behind Their Deafening Sound
That’s right: Up to 1.5 million cicadas from brood IX will emergefrom Virginia Tech’s Department of Entomology. This spectacular phenomenon hasn’t taken place in these areas since roughly 2003.
If you aren’t familiar with periodic cicadas, they’re very unique insects. Depending on the species, they will reappear annually or periodically every 13 or 17 years. Nymphs live in the soil, feed on roots, and only come out as mature adults in a synchronized show. The entire brood emerges to breed and lay eggs.
Why? That’s “one of the great mysteries of the insect world,” Virginia Tech’s statement reads. Scientists believe it may be a way for nymphs to avoid predators. But when they do come out, you won’t miss it—these bulgy-eyed insects areThis content is imported from YouTube. You may be able to find the same content in another format, or you may be able to find more information, at their web site.
that they can reach 90 decibels, which is “as loud as a lawn mower, dirt bike, or tractor” and has been likened to “the whining of electrical wires rising and falling.” For one annual species in the Midwest, “the song sounds like someone is pressing scissors against a grind wheel in rapid succession,”
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