The instrument I created was a pan flute, which is a wind instrument. To create noise with a wind instrument you need vibration. When using a pan flute, you have to create vibrations by splitting the air and blowing. Once the vibration is started by splitting the air, it needs to propagate through a tube. We used tubes ¼ of the wavelength to create the note we wanted from that certain tube. For example, the C4 note has a wavelength of 131.87, and ¼ of that is 32.97, making 32.97 the proper length of the tube to create that note. But, to be more efficient, I divided that and split the correct sized tubes in half, and plugged the bottom. This creates a smaller tube and an easier panflute to use. We plugged the bottom of the tubes using quarters so the wave still travels the same length, it goes down and then back up through the tube. I can amplify the sound on my pan flute by increasing the strength of my blows, making more vibration through the pipes.
In a wind chime the vibrations of the pipe make the sound after being struck. Sound can be produced when the tubes or rods come in contact with either something hitting it or air moving it.My chimes are standing ones that have 2 holes in each end of the pools they are tied down so that they do not hit each other. They are tied down with fishing lies so it doesn’t affect the pitch or the volume of each pipe. The actual chime part is made out of polythene pipes. The frame is built out of 4 different pieces 2x4 and then the other 2 are just 1x1. Chime lengths 30cm, 28.289, 26.832, 25,98, 24.495,23.238, 21.909, 21.213.
When you strum the strings they generate vibrations, as you strum the string the tension and length of each one changes the note that each string makes. Most string instruments vibrate as one standing wave, which is half of one wavelength. The thickness of the string also makes a difference, the ticker string makes for a lower frequency and vibrates slower. Vice versa the thinner string will have a higher frequency and the strings will vibrate faster, this can also change the pitch of the noise being made. For string instruments the string length is half the wavelength of the note. For the string instrument we took a piece of wood with a smaller piece of wood vertical on one side of the wood slab on the bottom. Then there are screws on the back side of the vertical piece of wood. On top of the vertical wood there is a piece of PVC pipe, the strings are cut to each length (in the table below). Each string is hot glued and tied to one screw on the back side of the vertical piece of wood as well as the screw on the end of the board. The screw on the end can be tightened making the string tighter. This helped change the pitch of each note.
The Fantastic Intergalactic
When you look up at the sky you see stars surrounded by black, but there is more to the universe than just that, there are nine planets in our solar system, orbiting the sun, including earth, isn't that fun? Newton’s law states that every particle in the universe has a force on every other particle. Isn't that radical, to find the force of these particles you solve an equation, it is that simple.
Chorus:The universe has many elements that spread far, and wide, and can even sometimes collide
stem is fun, stem is great learn a lot even about space, And in the process we learn some more, Equations and solutions what a score
Some equations we know and love, is the force of gravity on things that are happening above
The universal gravitational constant is 6.67*10^⁻11, and we need to know this to understand the concept. When an object is in orbit, it has a velocity and period, these numbers may seem like a monstrosity but don't worry, we can find them by solving equations in a hurry.
Chorus: The universe has many elements that spread far, and wide, and can even sometimes collide
stem is fun, stem is great learn a lot even about space, And in the process we learn some more, Equations and solutions what a score
We discovered planets x and y it was cool because they were kind of sly, Finding the force of gravity of each planet from up in the night sky. There is so much more to this Universe that keeps on expanding and disperse, most of it unknown, this intergalactic world is never fully grown.
The process for this poject was deffinetly one of the more different ones, considering we couldn't finish building or instruments. From what we did in class and what we did out of school, I enjoyed this project and I thought learning about how each type of instrument worked was a really cool thing. The process building the instruments was interesting because we were all doing something different between each person in the group. For me, building our string instrument was fun because I think there were many options of kinds of string instruments I could build from. In the end I chose a simple type of instrument with one big base board and having the strings at different points of each end. I think the process of building this was interesting because at some points I didn't have a clue of what I was building, where as other times I knew what I had to get done. There were points that I had to redo stuff, such as picking the right string to use so that the noise was loud enough to be heard. Other than some other bugs I think building this was overall fun for what we got to get done.
Writing the song was a bit more difficult because I don't think anyone in my group had much experience writing songs. From my perspective the song we wrote turned out pretty decent and I liked the topic/unit in stem we decided to base our song around. Writing the song was kind of difficult being that we weren't able to be with our groups to finish this project. Writing the song we first started out writing a chorus and then building around that chorus. Adding different verses and such. In the end the song turned out pretty well and I think it flowed nicely.