Exercise 1 - Wave 5. NOT SUITABLE TO LISTEN TO WHILE DRIVING OR OPERATING MACHINERY. Do you want to Synchronise Both your Hemispheres ? You need a quiet place to lie down and a set of head phones. This is this first exercise of the gateway experience in Wave 5. For it to work, it needs to play different sounds into each ear at the same time, that is why head phones are required.(NOT ear pods as they microwave your brain)