  In this paper we attempt to present some questions with respect to the
approach used in some brazilian mid-level textbooks on the topic of stationary
sound waves in tubes. In addition to ranking the textbooks within a set of
criteria, we also present some suggestions for further discussions of this
topic. We suggest the use of gifs and animations and the use of two experiments
that allow you to view the profiles of variation of pressure and air
displacement for the harmonic modes of vibration.
