 Crickets produce the sound of their calls using a "file-scraper" system where, as the male opens and closes its wings, a plectrum (scraper) located on the posterior side of the left wing is rubbed against a filed vein located on the right wing.Structures called the harp and mirror allow the vibrations to resonate, producing the sound that we hear.Upon being approached by another individual, the male cricket will make antennal contact with the visitor.