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# Closed Pipe Harmonic

APPH12-AZJFBU

A certain pipe that is closed at one end has length $L$, and sound waves travel in the pipe at the speed $v$. This pipe is sounding the first harmonic above its fundamental frequency.

Which of the following is a correct expression for the frequency of the note that the pipe is sounding?

A

$\dfrac { v }{ 4L }$

B

$\dfrac { 3v }{ 4L }$

C

$\dfrac { v }{ 2L }$

D

$\dfrac { 3v }{ 2L }$