I know. I was explaining that the erratic measurement shouldn't be from the horn, as it does the opposite to the treble:
"By gradually changing the diameter of a connecting tube, and hence its impedance, there is a more gradual transition from the high impedance receiver to the low impedance canal, and hence less power is reflected...Consequently, the response is less peaky, resulting in improved sound quality."
Less peaky = smoother treble.
"Such technique is extremely useful for taming high frequency peaks/amplifying the treble acoustically at the same time..."
Yup, he is talking about the diameter of horn taming the treble.
Edited by SilverEars - 7/20/14 at 10:08am