Bridget Kendall and guests explore the unseen and often un-noticed power which noise has over us. With writer Garret Keizer, who is interested in the social and economic dimensions of noise; sound artist Jana Winderen who records sounds made by underwater creatures; and Cambridge Professor of English Steven Connor who focuses on the 'ums, ahs, ohs, and ahems', expressive language noises that are often dismissed as marginal or trivial.