As a young boy, Professor Graeme Clark's school teacher asked "What do you want to do when you grow up?" 

He replied "I want to fix ears." 

So began his lifelong pursuit to break down the barriers of profound deafness with the invention of the multiple-channel cochlear implant. 

Professor Clark, now 85 years-old, reflects on achieving his childhood dream to give sound and speech recognition to hundreds of thousands of people across the globe.

See acast.com/privacy for privacy and opt-out information.