If both the ends of the pipe are open then the instrument is said to be an open-end air column. We can find the frequency of the sound that is being produces and the fundamental frequency when the organ pipe is filled with some gas is given by the formula v=√RTM where M is the molar mass of the gas.

What is open organ pipe?

An open organ pipe is open at both the ends (figure). The air molecules at the ends can easily move out into the open space and are thus free to vibrate with a maximum amplitude. Therefore, when the air within the pipe vibrates in resonance, an atinode is formed at each end of the pipe.

What is the fundamental frequency of open organ pipe?

The fundamental frequency of an open organ pipe is 300Hz. The first overtone of the pipe has the same frequency as the first overtone of a closed organ pipe.