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In Reply to: Measuring horns posted by jeff mai on February 5, 2007 at 03:55:41:
I have measured several horns and this is normal behaviour. At least for the horns I have measured, mainly tractrix and exponential horns. The reason is, I believe, is that at the low frequencies the radiation is from the mouth of the horn. Then you are measuring in the nearfield of the aperture where you have different components of the acoustic field contributing to the sound pressure not only the ones surviving to the farfield. At higher frequencies the radiation takes part inside the horn where the radius of the radiating aperture is smaller and thus the nearfield is closer to the horn.seh
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- Re: Measuring horns - seh 06:36:08 02/05/07 (0)
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