Dobro

Today, I was introduced to a musical instrument I had never seen before: a dobro. It is like a guitar, except it doesn't have the hole in the middle, it has metal on it. This is the resonator, and it is what "creates" the sound.  To play it, you pluck on the strings and slide a metal piece along the strings, because the separation between the strings and the wooden body of the guitar is greater than in a guitar, so you can't press down with your fingers.  The vibrations created by the strings resonate off of the metal cone inside of the guitar, and this is what created the sounds in these instruments.