In 1912 Freud compared psychoanalysis to using the telephone, an instrument he disliked. Reflecting on this fear of the phone, the poet and New Generation Thinker Sarah Jackson, from Nottingham Trent University, explores the telephone's voices in philosophy and fiction.

The Essay is recorded in front of an audience as part of Sound Frontiers: BBC Radio 3 live at Southbank Centre celebrating 7 decades of pioneering music and culture.

New Generation Thinkers is a scheme run by BBC Radio 3 and the Arts and Humanities Research Council to find academics who can turn their research into radio.

Producer: Fiona McLean.