Siri, the strangely calming 'intelligent personal assistant' by Apple, has a pretty distinctive voice. The program slowly conditions itself to your personal choices based on your individual searches and language, and can answer questions, perform actions and delegate requests, which is all pretty neat. Most people use it to just play around though, usually indulging in mindless explicit banter and never really attributing a face to the voice.

A few years ago, the voice behind the American Siri was found to be that of 65-year-old New Yorker Susan Bennett.

Siri was first introduced in the Iphone 4S in 2011, but it's interesting to note that Susan initially had no idea that it was her voice being used in the program. The way it went is, a software company called ScanSoft was looking for someone to be the voice for a database project involving speech construction in 2005. They reached out to GM Voices, and when the scheduled voice-over artist was absent, they decided to go with Susan.