A pipe closed at one end produces only odd-numbered harmonics.

Evidence

In this case the first mode is at half the frequency of the pipe, that is open at both ends, and an octave below on the musical scale, which is F2. The second mode is now at three times the lowest mode, which is approximately equal to C4 on the musical scale. — David Howard, Jamie Angus, coustics and Psychoacoustics, 416

Categorization

• XREF: connects to: A stopped cylindrical pipe supports only odd-numbered modes — David Howard, Jamie Angus, coustics and Psychoacoustics, 1241