Chris Ledgard endures bars, clubs and flight paths to listen to speech through noise.
Helen Keen explores selective mutism, a condition often described as a phobia of speaking.
University of Hertfordshire students create an oral history archive - in a weekend.
Olivia O'Leary follows historian Theodore Zeldin in the quest to reform conversation.
Michael Rosen talks to psychotherapist Philippa Perry about the importance of small talk.
Michael Rosen and Laura Wright discuss how we take it in turns to talk, in conversation.
Josie Long hears stories of intimate conversations.
Soprano, broadcaster and inveterate whistler Catherine Bott on the art of whistling.
Angela Saini explores the science of birdsong and its relationship to human language.
Jolyon Jenkins meets the people who want whistling to be taken seriously as a musical art.