Acoustical analysis of the Boehm flute
John W. Coltman · The Journal of the Acoustical Society of America · 1979
Experimental determinations were made of the acoustic reactance of finger holes and keys typical of the modern C flute, and of the column-lengthening properties of the cavities formed by the closed keys. Formulas are given by which these parameters can be used to predict the effect of variations in finger holes. Calculations of resonance frequencies are made for a flute, and compared with the intonation as played. The transmission line analogy is used to calculate standing-wave distributions, wall losses and radiation losses for some notes in the third register.