Chimes with Wrenches

First let me start off by explaining how it works. The wrenches create vibration after
hitting them. The vibrations then make sound and that's what we hear. I decided to use wrenches
because I noticed that they always make a very clear sound. I hit it with an extra wrench that I
had. That wrench creates a vibration when metal comes in contact with metal.
Here is table of the notes of my instrument. On the far left is the masses of all the wrenches. And
the right is the lengths of all of the wrenches. The vibration of the wrenches is so powerful it
causes the sound to amplify very loudly. The wrenches have lots of revenance they carry out the
sound for a long time.

Unison 1.0000 1.0000

Minor Second 25/24 = 1.0417 0.9798

Major Second 9/8 = 1.1250 0.9428

Minor Third 6/5 = 1.2000 0.9129

Major Third 5/4 = 1.2500 0.8944

Fourth 4/3 = 1.3333 0.8660

Diminished Fifth 45/32 = 1.4063 0.8433

Fifth 3/2 = 1.5000 0.8165

Minor Sixth 8/5 = 1.6000 0.7906

Major Sixth 5/3 = 1.6667 0.7746

Minor Seventh 9/5 = 1.8000 0.7454

Major Seventh 15/8 = 1.8750 0.7303

Octave 2.0000 0.7071

Here is what the ratio should be for the chime instrument. My ratio is different. The first four
wrenches the tone are in perfect pitch for the scale. Then 5th, 6th, 7th , and 8th are very out of
tune. I tried my best to research why. I took the masses and lengths of all the wrenches and they
seem to go down in mass and length at a pretty consistent rate. Then we got to the end, and the
wrenches 7/16 and are so similar in length and mass and they are such a different note. That is
when i realized that the wrenches are very unpredictable in notes.

Note Frequency(Hz) Wavelength(cm)

A1 55.00 627.27

B1 61.74 558.84

C1 32.70 1054.94

C#1/Db1 34.65 995.73

D1 36.71 939.85

F1 43.65 790.31

C1 32.70 1054.94

That is the table for all the notes that they played, the wrenches are very unpredictable.. I got the
notes of what i paid for.

Wood Harp

As you can hopefully guess, I made a wooden harp. This harp has a wooden framing and
uses fishing lines as the strings. I used fishing line since it is able to stretch without snapping so
I could tighten the line. I was able to tighten and tune the line with screws which I would screw
in and out more depending on what note I was trying to get. The tighter lines caused them to
have more tension which allowed them to vibrate faster causing a louder sound. I was able to
then tighten the screws to a specific point using a pitch matcher online.

Note Frequency (Hz) Wavelength (cm)

C5 523.25 65.93

D5 587.33 58.74

E5 659.25 52.33

F5 698.46 49.39

G5 783.99 44.01

A5 880.00 39.20

B5 987.77 34.93

The next step was to make my harp sound loud and clear and to do this, I needed to
amplify it. I did this by making a barrier on the backside of my harp so that the sound waves
would all get redirected in front of the instrument. This allows for a clearer and louder sound.
There was not a natural frequency to the string since hitting it by itself does not create a sound.
The harp plays seven octaves, from A to G and was placed at a certain distance apart for
each one. To get the distance for each stings, you would take the wavelength and divide it by
two. This allowed the strings to be much easier tightened since they were all at the right length.
 STEM Instrument (Wind Instrument)

With this flute-like instrument, the object itself isnt exactly vibrating, except, it
acts as a chamber that I then can vibrate with my mouth. The air constantly vibrates
within the pipe, which then comes out the various holes on the exterior, which can then
be blocked with my fingers to change the octave or pitch. The sound is then amplified
when it leaves the funnel at the end.

The instrument plays 7 of the 8 octaves that the human ear can hear. However,
one of the holes was slightly misplaced, so the third octave doesn't play the way it
should. The funnel allows the sound to be bounced back and forth throughout the funnel
which then amplifies it. There is no natural frequency due to the object being made of
mostly plastic and duct tape. The following table shows my instruments tuning.

Percentage Note Distance

100% C4 65cm

83% B3 53.95cm

73% A3 47.45cm

68% G3 44.2cm

58% F4 37.7cm
 One Stringed Bass Guitar
The source of sound in this instrument is the vibration of the string. When the string is
shortened in length by a finger holding it down, it makes a different and higher note, because the
string has less to vibrate, so it vibrates faster. The vibration of the string then vibrates the
cardboard body of the guitar, which then directs it outwards away from the user.

Each note is based on the wavelength compared to the length of the string. The
wavelengths and frequencies are listed below.

Note Frequency (Hz) Wavelength (cm)

C4 261.63 131.87

D4 293.66 117.48

E4 329.63 104.66

F4 349.23 98.79

G4 392.00 88.01

A4 440.00 78.41

B4 493.88 69.85

In order to keep the size of the instrument relatively small, half of each wavelength was
used to keep the same note and not used a large amount of space.