The science of hearing – By Douglas L. Oliver – Recommended by Mel

https://ed.ted.com/lessons/the-science-of-hearing-douglas-l-oliver

This is a great lesson. It focuses on one topic, and brings it to life. Sound is such an integral part of our existence as humans, our abilitiy to detect what our eyes cannot. And beyond our bare existence, music brings us pleasure that defies description. Finally our ability to detect voices, speech and the state of being of the person that is speaking is sometimes uncanny.