Listening

Pink noise is differencing technique where you listen to differences, discount sounds that are the same. You would experience this type of noise by listening to your AC. At first you would hear it and notice it. but as time passes, you stop paying attention to it and don't even notice the noise its making. 
Yes, it does interfere with my ability to listen by how if it's not in sync with one another, it might be hard to comprehend in a way.

In today's world, audio recording is so common nowadays to the point where people aren't listening to each other in person, rather through media. And, in busy cities where there is a lot of commotion, everyone has their earphones in, and not listening to one another. 

Tips that the speaker suggests is to go for 3 minutes of complete silence, listen to how many channels you can hear in an environment, and to move your listening position.