What is the cone of silence?

The cone of silence is a fictional device from the television series "Get Smart," created by Mel Brooks and Buck Henry. It is designed to create a soundproof area for confidential conversations, but it often fails to work properly, leading to humorous misunderstandings. The concept satirizes the seriousness of espionage and communication security in a comedic way. Despite its intended purpose, it often traps characters in awkward situations rather than providing true secrecy.