One
http://www.youtube.com/watch?v=nR6PfJZSqh0&feature=related
To
produce the sound of the guitar, the player had to pluck at each string.
The way he changed the note was plucking at different parts of certain strings and holding certain strings down towards the top of the guitar. The guitar is shaped regularly. The strings are straight down from the top of the guitar to the middle. The big part is shaped as like…a circle with its two sides squished in. The creation and change of the sound makes me think of tension and the length of each string having something to do with the pitch. I think that as you tune the guitar, which is pulling the strings tighter or loosening them, you affect the damping. Since it would affect the damping, the sound would either travel slower or faster depending on the tension of the string.
Two
In a guitar, the sound is produced when you pluck the string of course.
The thing about it is that when you hold your finger in different places on the
string of the guitar, the sounds changes. The reason this is so is because the
wavelengths change, giving you a lower sound the longer the wavelength, and a
higher sound the shorter the wavelength, the frequency of the wave is also affected
by the wavelength. When the wavelength is short, the frequency is high and when
the wavelength is long, the frequency is low. In order to change the wavelength
you must hold your finger at certain parts of the guitar string, making the string
either shorter or longer when you pluck it with your other finger. The sound is
loud because of the vibration. In the guitar there is a hole in the middle and
a box kind of thing behind it. The vibration bounces off of that back piece of
the guitar and out through the hole.
To change the pitch of my instrument, I will do the same. I will hold
my fingers down at a specific spot on the string and pluck it. The physical
characteristics that are important in this instrument are the length of the
string and the tension of the string.
I will be using wood and copper strings. I chose to use these two things
because they are also used in guitars, harps, and other string instruments and
they all get good sounds. To play it, I will pluck the strings at certain
parts. My plan to construct this instrument is to build it just like how a harp
looks….or as close as I can get to one.
#1
I will build,
and then later on play the Flute for my group presentation. Our objective is to
build an instrument, and then play it for our class. There are obstacles that
we need to do such as calculation and such in order to do this. I researched
the background of the Flute. To play the flute and produce
sound, someone will have to blow through a hole at the end of the Flute and
while blowing, there would be holes at the other end of the Flute where the
persons fingers will be covering the holes and uncovering the holes based on
what notes that they want to play, and to change the notes. The Flute is a basic pipe; it can have
either one fixed end or two loose ends. It also has holes that are different
lengths from the hole at the opposite end, which is where the person blows
into. When i think about myself playing the Flute in order to
change the sound, i will have to simply practice where at what time my fingers
cover and uncover certain notes (the holes at the opposite end of the blow in
hole). Compared to waves, the size of the flute, and where the
holes are, determines the sound outcome. As the notes changes, the notes change
as well
Resource :http://www.youtube.com/watch?v=crfrKqFp0Zg
#2
Energy
from the air molecules transfer into the hole that is blown through, and they
vibrate within the Flute, and as that happen, having the notes at the other end
of the Flute either covered or uncovered, the Flute vibrations actually turns
into sound. In order to change the pitch, the notes that are on the Flute are
the holes. The hole that is farthest away from where it is to be blown into is
the lowest note. The hole closest
to where we have to blow in the holes to produce sound makes the highest pitch.
So to change the pitch, simply change the notes. I will just use my fingers in
order to play this instrument. I will play my instrument based off of the songs
notes. If a note indicated that
have to play note A, then ill have to use one of my fingers to cover up the A
note. To build this instrument, I will have to have a PVC pipe for the flute structure
itself, duck tape to have a fixed end flute by covering one side of the pipe,
and a drill to drill holes where the notes will be.
