While out strolling one hot summer evening at sunset, my hearing was molested by a tree full of cicadas. The noise was deafening. A single cicada can produce a sound of 120 db (decibel). This tree must have had hundreds of cicadas.
There are some 3000 species of cicadas worldwide. Some species are periodical and only emerge from Mother Earth in cycles, for example, 13 and 17-year cycles. Other species are not fixed to a cycle and emerge annually. The noise making cicadas are the males calling for a mate. While in Mother Earth they feed on juices from plant and tree roots, not harming the plants or trees.
The cicada sings to Father Sun every summer. As Father Sun travels across the sky, cicada is there to serenade him on his journey. As Father Sun slips into the Underworld, the cicada gives him one last burst of song at the highest db level. By the way, while Father Sun is traveling through the Underworld, cricket sings to Mother Earth all night.