Why does ladybugs make sounds?

A subtle chatter is the noise that a ladybird makes, according to the kgb website. A powerful sound detection device may be able to pick up the breezy sounds of a ladybug moving and using two sets of wings to fly. It also may record the scraping scratches of ladybugs consuming and swallowing such pests as aphids, mealybugs, scale and thrips.