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## Main Question or Discussion Point

I don't understand how to get n... if that doesn't make sense i can explain more... I have the length and velocity... from there i just don't understand what n even is or means...

- Thread starter abbeygeib
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I don't understand how to get n... if that doesn't make sense i can explain more... I have the length and velocity... from there i just don't understand what n even is or means...

- #2

FredGarvin

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n is the mode or the multiple of the fundamental frequency. If you want the third harmonic, n=3.

- #3

sophiecentaur

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The fundamental frequency will be the frequency at which there is a half wavelength between the two ends - allowing a node at each end*. The first overtone will be when there is a node in the centre (i.e. at near twice the frequency) and the second will be when there are two nodes - asoasf.

* fundamental f =c/2x

where c is the speed of sound in the tube and x is the effective length

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