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Comparison of Two Methods for Measurement of Horn Input Impedance

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Two methods to measure the acoustic input impedance of a horn are compared. The first method measures standing-wave patterns in a tube which is loaded by the horn. The input impedance is calculated from the position of the first minimum in the standing-wave pattern and the ratio of maximum to minimum sound pressure levels in the tube. Second a direct method was applied. A novel flow sensor, the microflown, is used together with a pressure microphone, which are mounted in the throat of the horn. Results from both measurements are compared with simulated models.

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JAES Volume 46 Issue 12 pp. 1119-1125; December 1998
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Permalink: http://www.aes.org/e-lib/browse.cfm?elib=12119

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