Sound is capable of producing powerful reactions in the listener - whether it's a sudden cold sweat caused by a snake's warning hiss, or the uncontrollable grin as a favourite song from our youth comes on the radio. Scholars have been fascinated by the relationship between sound and emotional states since at least the time of the Ancient Greeks (whose wild Dionysian parties could be seen as the equivalent of a modern-day rave!), and modern neuroscience has led to some fascinating advances in our understanding of why our ears and emotions have such a strong bond