Estimate the length of an organ pipe emitting a frequency of 130 Hz.

Question

( Velocity of sound = 340ms^-1 )

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Answer 1

The theory for resonant frequencies of a pipe closed at one end gives us the equation:

f = v/(4*L)

f = 130 Hz.

v = 340ms^-1

Solve for L.

Answer 2

1.307m for an open pipe

0.6538m for a pipe with a closed end