The power of voice is something we seldom think about. Yet voice is ubiquitous and can be extremely effective, as podcast listeners know very well. What makes speech unique, compared with images? What chords does it strike? And how can we harness the power of voice? Kurt Munz, assistant professor of marketing at Bocconi, unfolds for us the meaning of "auditory information processing" starting from his own experience as an officer in the US Navy.