The First Four Harmonics
The fundamental and three lowest overtones for a tube closed at one end. All have maximum air displacements at the open end and none at the closed end.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"OpenStax College, Sound Interference and Resonance: Standing Waves in Air Columns. February 23, 2013."
http://cnx.org/content/m42296/latest/
OpenStax CNX
CC BY 3.0.