If you’ve ever felt the shock of listening to a recording of your own voice, you realise how important your voice is to your personal identity. We judge others not just by their words but by the way they talk: their intonation, their pitch, their accent. The Professor of Acoustic Engineering explores the full range of our voice – how we speak and how we sing; how our vocal anatomy works; what happens when things go wrong and how technology enables us to imitate and manipulate the human voice.