Straw Pan Flute
Learn how to make a straw pan flute that plays an eight note scale. Calculate the length of each straw pipe and put together you masterpiece.
Longer Wavelength Creates a Lower Frequency
In an open ended pan flute a standing wave is created. The longer the wind column the larger the standing wave. A larger standing wave creates a lower the frequency. We perceive frequency as a highness and lowness we call pitch.
Straw Pan Flute That Plays a Full Scale (C, D, E, F, G, A, B, C)
#1 Measure the diameter of your straw.
#2 Use the wavelength and diameter and solve for the length of each straw wind column (L).
Variables: L - length of pipe λ – wavelength d - diameter of pipe
Calculation: L = λ/2 – (0.4)(d)
#3 Measure and cut your straws the length of the eight wind columns (L) you calculated.
#4 Tape all the straws together as seen in the picture. Pull out enough tape to go around all the straws placed flat on the table. Lay the tape flat on the table sticky side up. Lay the straws with one end flush with the tape from largest to smallest. Next, wrap the tape around the front of the straws to keep them in place.
Straw Length Calculation for Wind Column Notes
| Wind Column
Note |
Wavelength (𝜆)
(cm) |
Work
L = 𝜆/2 – ((0.4)(d)) (cm)
|
Length of Straw (L)
(cm) |
| C | 16.25 |
|
|
| D | 14.5 |
|
|
| E | 12.9 |
|
|
| F | 12.2 |
|
|
| G | 10.85 |
|
|
| A | 9.65 |
|
|
| B | 8.6 |
|
|
| C | 8.15 |
|
Links
- Back to the Sound Page
- Back to the Main Waves Page
- Back to the Stickman Physics Home Page
- Equation Sheet