The Apparent Apex method of measuring the polar response of a horn is extended to the three-dimensional case. As in the earlier two-dimensional analyses, the measured response is found to be dependent on the point of rotation, and on the distance to the measurement microphone. Computer-based directivity models are developed and validated. Alternate test methods are presented and analyzed. Measurement procedures are recommended.

Author: Ureda, Mark S.
Affiliation: Mark IV Audio, Incorporated, Buchanan, MI
AES Convention: 91 (October 1991) Paper Number: 3166
Publication Date: October 1, 1991 Import into BibTeX
Subject: Measurements
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=5550

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