Go to a busy public place, a playground, a park. Sit.
Wait and then close your eyes. Listen.
What do you hear now?
A whole lot more. More details, more sounds you were unaware of. More of everything you could not have perceived moments ago.
Repeat the process as many times as you wish.
Now you understand why in a darkened room, late at night, music sounds so much better and you hear into it, rather than just it.