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be wrote:

By distortion in the throat I mean distortion caused by the nonlinearitiy of air that manifest itself by high pressures.

Erik, I do not see why higher pressure atomically implies nonlinearity. Gas pushers its walls very linear in all directions and, as I remember from my high school, the nonlinearity of pressure come only from the nonlinearity of temperature and volumes. Mostly likely you refer NOT to “nonlinearity of air that manifest itself by high pressures” but to the nonlinearity of jointing the profiles of horn and internal waveguide of a compression driver. This does take place but I never seen anyone bitch or even care about it beside me…. (Read my Vitavox  S2 with electromagnet thread)

be wrote:

I dont think this was known in those days.

You would be very surpassed what know in those days… :-)

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