Boys Ultimate - City Championships
The general shape of a xylophone is a rectangle. To change the not of a xylophone, you have to hit a different note on the xylophone with a mallet. You can alter the sound by altering the density of the individual notes. I've noticed that different dimensions of bars give off different sound. So this can tie end to density and surface area having something to do with what produces certain certain waves. http://www.youtube.com/watch?v=BHP5xjBP-9I (This is a link that shows a xylophone being played).
For my Physics Benchmark my group will have to form a band with our own homemade instruments. The instrument I would like to focus on is the guitar, I would like to build this instrument because growing up I always wanted to play the guitar but I was never able to take lessons so this would give me a perfect opportunity to play this instrument.
The guitar is played by plucking a set of strings and sliding your fingers down the long fretted neck of the guitar that makes different sounds when touched in different places which would be the way you changed a note by moving your finger to different places on the neck of the guitar.
There are two types of guitars, there is the acoustic and the electric. The basic shape of a guitar I would describe as the figure eight with a hole directly in the center of the body on an acoustic guitar. However, an electric guitar doesn’t have a hole in the center of the body. They both have different but very similar shapes, both types of guitars have 12 components minimum but an acoustic guitar has 20 total. Below is a picture of both types of guitars with their matching and different parts labeled.
I believe that the hole in the body of the guitar combined with the way you move your fingers on the fret board have something to do with the way you create and change the sounds that come out of the guitar. I believe that when the stings on a guitar are plucked they send some type of vibration or wave through the fret board and that causes the strings to make the different sounds that they make causing them to turn into different sound waves.