Welcome to What’s Up Docs?, the podcast where doctors and identical twins Chris and Xand van Tulleken tune in to the ideas shaping our health and wellbeing.

In this episode, they turn their attention to the voice. Where does it come from, why do we all sound so different, and how much can we really change it? They also explore what we should be doing to take care of our voices.

To help them strike the right note, they’re joined by voice specialist and speech and language therapist, Lydia Hart.

If you want to get in touch, you can email us at whatsupdocs@bbc.co.uk or WhatsApp us on 08000 665 123.

Presenters: Drs Chris and Xand van Tulleken Guest: Lydia Hart Producer: Maia Miller-Lewis Executive Producer: Rami Tzabar Editor: Jo Rowntree Researcher: Grace Revill Tech Lead: Reuben Huxtable Social Media: Leon Gower Digital Lead: Richard Berry Composer: Phoebe McFarlane Sound Design: Ruth Rainey

At the BBC: Assistant Commissioner: Greg Smith Commissioning Editor: Rhian Roberts

A Loftus Media production for BBC Radio 4