Ari Horton is many things – an advocate for kindness, a Cordon Bleu trained pastry chef and, just very occasionally, a paediatric cardiologist. Andrew Tagg remembers the day Ari found his calling. Working as a paediatric ED resident in Melbourne’s inner west he came to present a patient. He could barely sit still and his grin threatened to infect the fishbowl as he announced, “I found a murmur!”

We may not all be as acoustically gifted as Ari but that thing we wield around our necks is not just for listening for wheezes or for distracting toddlers.