Question

A 3rd harmonic is being produced in a tube that is open at both ends. The tube is 3 meters long and

the speed of sound is 340 m/s. What frequency will an observer hear?

Answer 1

The frequency of the second harmonic is 880 Hz (a pitch of A5). The speed of sound through the pipe is 350 m/sec. Find the frequency of the first harmonic and the length of the pipe. The length of an air column is related mathematically to the wavelength of the wave which resonates within it.