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Structural resonance

Sunn · 2009-11-19 16:00:42

I am building a (type of)xylophone using metal bars. I want to determine the pitch based on the length, or in other words I want a pitch series of D.F.A,C etc but obviously I need a specific length in order to determine the pitch. I have found an equation but I am not really sure how it works, if in fact that is the…

19-11-2009 05:00PM

#1

Sunn

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Join Date: September 2005

Posts: 332

I am building a (type of)xylophone using metal bars. I want to determine the pitch based on the length, or in other words I want a pitch series of D.F.A,C etc but obviously I need a specific length in order to determine the pitch.

I have found an equation but I am not really sure how it works, if in fact that is the formula (although I am sure it is correct)

ωn = (2n + 1)2/9.

I think N related to the Node (which is a constant of 1 as the metal bar is open at both ends) But I can't find any information on it.

Any help would be greatly appreciated.

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Comments

#2 19-11-2009 06:20PM

Fringe

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Posts: 1043

I'm going to take a guess and say that n is the harmonic and w is the angular frequency.

w = 2(pi)f where f is the frequency of the sound wave.

There's no length anywhere so dunno what you'd do about that or if the equation even makes sense.

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