Build a Band
Concepts
Interference - adding two waves together
Positive (Constructive) interference - adds to create a bigger wave
Anti node - the maximums and minimums of a wave
Pitch - due to varying frequency, creates different notes that we hear
Non Constructive interference - adds to make a smaller wave
Node - area between a wave
Doppler Effect - the concept of a change in frequency due to the motion of a source
Blue shift - increase in frequency
Red shift - decrease in frequency
Resonance - the process of creating a standing wave when unnatural vibrations are equal to the natural wavelength/frequency
Sound waves - created by the vibrations of material objects; compression and rarefaction
Compression - pushes together
Frequency - how often a vibration occurs in Hertz, or cycles per second
Period - amount of time between waves [period = 1 / frequency]
Wave - disturbance or vibration through a medium
Wave Speed = Wave length x Frequency
Transverse waves - move up and down
Longitudinal waves - moves compression horizontally
Anti node - the maximums and minimums of a wave
Pitch - due to varying frequency, creates different notes that we hear
Interference - adding two waves together
Positive (Constructive) interference - adds to create a bigger wave
Anti node - the maximums and minimums of a wave
Pitch - due to varying frequency, creates different notes that we hear
Non Constructive interference - adds to make a smaller wave
Node - area between a wave
Doppler Effect - the concept of a change in frequency due to the motion of a source
Blue shift - increase in frequency
Red shift - decrease in frequency
Resonance - the process of creating a standing wave when unnatural vibrations are equal to the natural wavelength/frequency
Sound waves - created by the vibrations of material objects; compression and rarefaction
Compression - pushes together
Frequency - how often a vibration occurs in Hertz, or cycles per second
Period - amount of time between waves [period = 1 / frequency]
Wave - disturbance or vibration through a medium
Wave Speed = Wave length x Frequency
Transverse waves - move up and down
Longitudinal waves - moves compression horizontally
Anti node - the maximums and minimums of a wave
Pitch - due to varying frequency, creates different notes that we hear
String Instrument
String Instrument:
All string instruments make sounds with tensioned strings and a hollow case that amplifies the sound waves. Different types of strings produce different sounds. For example, the tighter the string the higher the sound and the thicker the string the lower the sound. String instruments are plucked, bowed, or struck to produce a sound and the placement of an object on the strings can affect the pitch of the instrument. For our instrument we created a bass guitar with one string that plays seven notes. We play our instrument by pressing down on nails that signify where the proper notes can be played. When we strum that note, the string vibrates to a hollow glass bottle that amplifies the sounds wave produced by the string. We figured out where to place our strings by taking the wavelength and dividing it by two. We did this because strings only get half a wavelength. After dividing, it gave us the centimeters which determined where we would play each note on the string. For example, the note C4 is 131.87cm (wavelength) which means we would play the note 66cm away from the bottle.
All string instruments make sounds with tensioned strings and a hollow case that amplifies the sound waves. Different types of strings produce different sounds. For example, the tighter the string the higher the sound and the thicker the string the lower the sound. String instruments are plucked, bowed, or struck to produce a sound and the placement of an object on the strings can affect the pitch of the instrument. For our instrument we created a bass guitar with one string that plays seven notes. We play our instrument by pressing down on nails that signify where the proper notes can be played. When we strum that note, the string vibrates to a hollow glass bottle that amplifies the sounds wave produced by the string. We figured out where to place our strings by taking the wavelength and dividing it by two. We did this because strings only get half a wavelength. After dividing, it gave us the centimeters which determined where we would play each note on the string. For example, the note C4 is 131.87cm (wavelength) which means we would play the note 66cm away from the bottle.
Woodwind Instrument
Woodwinds are basically defined as hollow tubes, which, when blown onone end, produce a sound. Most woodwind instruments have keys or fingerholes to vary pitch of the sounds. Different notes are created by shortening orlengthening the air column inside the instrument. This is usually achieved bycovering certain holes on the instrument, either with keys it finger while playing. For our instrument we convinced different elements from different instruments. We have a funnel on the end of a PVC pipe that is similar to endof a trumpet that amplifies the sound. The shaft has seven holes that play different notes when covered, similar to a clarinet or recorder. We used the same method to find where to place the holes that play different notes
Chime Instrument
A chime is an instrument usually hollow or solid and when struck, it creates a sound. The size or thickness of the object can create different pitches and different types of metals can make various pitches due to length or thickness of the object. When struck it vibrates the air particles that travel to our ears, letting us hear the instrument. For our instrument we decided to use bottles that contains different amounts of water that affects the pitch. The more the water the lower the pitch and little water the higher. We have seven bottles in total, each holding different amount of water. We added water by 50 mL. For example; C4 has no water, D4 has 50mL, E4 has 100 mL, F4 has150mL, etc.... So when we hit them they each have a different sounds.
Reflection
I believe my group went above and beyond expectations when it came to this project. We were the most decorative and on task group, in my opinion. We all chipped in ideas and all worked together to build our final outcome. I enjoyed this group very much, we all worked well together, there was a lot of compromise when we fail at one idea, and everyone has a say in everything. Our decorator did an amazing job doing all the deign and art work on the actual instrument. The person behind all the correct placement of notes was incredibly focused and determined to find the exact measurements. And the person behind all the building and gathering of materials did a great job finding what we already hand and gathered great pieces that had many thing that could be done with it. It took us two weeks to put together the whole project including all the justifications and descriptions. We even sat down and brainstormed a song we could preform. We ended up picking Magic by B.O.B and putting our own lyrics into it. Our ending lyrics all had to do with physics and the STEM program. It was a unique way of putting all the concepts we learned into a fun project. Overall, i feel my group did a great job with all the requirements and achieved all the standards and put together interesting instruments.