Answer:
The distance from the top of your head to the floor standing up straight.
It is a symphony of noise, It can produce both grief and joys, It is inspiring and grand, Made by a person or a band.
They are the shore's gallant knights.
What grows when it eats, but dies when it drinks?
You'll have to consult an optometrist if you want to improve this.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?