Voicebox takes a look at the power and pervasiveness of the human voice in shaping our everyday world. Hosted by Ezra Zaid, Voicebox examines the impact of this uniquely human instrument and the role it plays in making and breaking the bonds between us.

Everything from speed dialling, scheduling meetings and searching for directions — Siri was the revolutionary digital voice-activated personal assistant of the iPhone. We spoke to Susan Bennett, the original voice of Siri.