Harmonics terminology for an open-closed tube

AI Thread Summary
In an open-closed tube, the wavelength is determined by the formula λ = 4L/m, where m takes odd integer values (1, 3, 5, ...). The confusion arises from differing interpretations of harmonics; one view considers m=1 as the 1st harmonic, while another categorizes m=3 as the 2nd harmonic. The physics professor's perspective aligns with the definition that the first harmonic corresponds to the fundamental frequency, with subsequent odd integers representing higher harmonics. Clarification is needed on the distinction between harmonics in open-closed tubes versus closed tubes. Understanding these definitions is crucial for accurately interpreting harmonic series in acoustics.
jumbogala
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Homework Statement


When you have an open-closed tube, I was taught in high school that when using the equation

λ = 4L/m, m = 1, 3, 5, 7, ... where m = 1 corresponds to the fundamental mode.

I was taught that m = 1 is the 1st harmonic, m = 3 is the 3rd harmonic, etc.

But my physics prof says m = 1 is the 1st harmonic, m = 3 is the 2nd, m = 5 is the 3rd, and so on. I'm just really confused about which one is right... can anyone explain?


Homework Equations





The Attempt at a Solution

 
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m=3 is the second harmonic because when m=2 then it's a closed tube.
 

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