Voice changer in the context of "Anonymous (group)"

Anonymous is an international collective, organized as a decentralized group of activist and hacktivist individuals, best known for orchestrating cyberattacks against governments, government institutions, agencies, corporations, and the Church of Scientology.

Anonymous originated in 2003 on the imageboard 4chan representing the concept of many online and offline community users simultaneously existing as an "anarchic", digitized "global brain" or "hivemind". Anonymous members (known as anons) can sometimes be distinguished in public by the wearing of Guy Fawkes masks in the style portrayed in the graphic novel and film V for Vendetta. Some anons also opt to mask their voices through voice changers or text-to-speech programs.