Pipe Open Both Ends (Antinode–Antinode)

Overview

Both ends are open → both ends are antinodes. All harmonics present: n = 1, 2, 3... Wavelength: λ_n = 2L/n. Frequency: f_n = nv/2L. Identical formulas to the string! The fundamental (n=1) has λ = 2L, one antinode in the middle. This is why flutes and organs with open pipes behave like strings.