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Question:

If you cut a copper pipe too short, what can you do to have it make a lower sound?

I‘m making a copper-pipe xylophone for a school project, but all my pipes are one octave too high. Following the formulas I found online, I tried to calculate the lengths necessary for a C4 scale xylophone, but the resulting numbers were ridiculous (55 something inches for C4. T__T) Then, I tried buying thicker pipes to make the sounds lower, but was flabbergasted when the notes actually got higher.The pipes I have right now are 1/2 inch ones (the thinnest pipes in Home Depot. I think), in a C5 Major scale with measurements of 258 mm, 245 mm, 230.5 mm, 223 mm, 210.5 mm, 199 mm, 186.5 mm, and 181.5 mm. (C5, D5, E5, F5, G5, A5, B5, C6)I‘ve searched multiple sites and have not been able to find a solution to this problemo. ;__;Is there any way to alter each pipe that would made them go down an octave? Also, how would one determine the measurement for an F#? Please, please answer if you can; I need the project done by next Friday! lt;3 Thank you so much, I am eternally indebted to youuu!!!!!!!!!!!lt;3:D

Answer:

If you close one end of each tube, you will get a resonant frequency of 1/2 what you would get if it were open ended. It drops about 1 octave.

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