Why Do Cicadas Make Noise
Cicadas are able to produce their loud, iconic sounds because the males possess an organ that is almost unique among insects, the tymbal organ. Their songs are affected by weather variations, and each of the 3,000 cicada species has a unique sound. Unlike crickets or grasshoppers, cicadas do not make sound by rubbing their legs or wings.
Their unique sound system is internal driven by the rapid contraction of the tymbal muscles. In addition to attracting a mate, the loud noise actually repels birds. The cicada's song is painful to the birds' ears and interferes with their communication, making it difficult for the birds to hunt in groups.
How Do Cicadas Make That Noise? A team of U.S. Naval researchers analyzed the cicada's sound and explained that "the insects manage to produce their incredibly large sound because they have a unique anatomy that combines a ribbed membrane on the torso that vibrates when they deform their bodies." The Biological Reasons Behind Cicada Calls The purpose of the loud sounds produced by male cicadas is to attract mates.
Each cicada species has a distinct song that helps females of the same species identify and locate suitable partners, even amidst the calls of other species. The cicada generates sound by rapidly contracting the strong tymbal muscles attached to the base of the membrane. This muscle contraction pulls on the tymbal, causing the stiff ribs to buckle inward sequentially, which generates a distinct, sharp click or pulse of sound.
Despite the bugs' ubiquity, scientists haven't uncovered how they sing so loudlysome are as noisy as a jet engineand why they don't expend much energy doing it. But researchers reported in Montreal yesterday at the 21st International Congress on Acoustics that they now have the answer. Male cicadas produce their calls by rapidly vibrating a white, drumlike plate, or tymbal, located on either side of their abdomens.
Males have special structures on their undersides called tymbals. Repeated contraction and relaxation of the tymbal makes the distinctive sound. Each species has their own song.
This is how females can identify the right species of male to mate with. What do cicadas sound like? The loud sounds that you hear come from male cicadas looking for females to mate with, according to Arizona State University.
