LXXXI.The effect of variation in the pressure of the air and dimensions of the mouth on the frequency of an organ flue-pipe
A E Bate · The London Edinburgh and Dublin Philosophical Magazine and Journal of Science · 1929
The vortex theory of edge tones is shown to apply in the case of the mouth of an organ pipe in that V/nh = a constant, where V is the velocity of the air jet, n is the frequency of the note, and h is the height of the mouth. If V is in feet per second and h is in feet, the constant is 2 for ordinary edge tones ; whereas it is large in the case discussed, and is given by 74/3 (0·3-s), where s is the thickness of the jet in inches. An explanation of the deviation is offered, and this indicates that the diameter of the vortices is the same for the three slit-widths used, at all frequencies, for the same value of h, but increases with increase in height of mouth.