Find the greatest length of an organ pipe open at both ends that will have its fundamental frequency in the normal hearing range (20—20,000 Hz). Speed of sound in air = 340 m s-1.
Given:
Speed of sound in air
We are considering a minimum fundamental frequency of ,
since, for maximum wavelength, the frequency is a minimum.
Length of organ pipe
We have:
We know that:
On substituting the respective values in the above equation, we get:
Length of the organ pipe is 8.5 m.