This paper presents the apparent apex of a horn and how it relates to directivity response measurement. Several mathematical models are used to relate horn size, coverage angles, frequency, microphone distance, and measurement error. These show that directivity error is directly related to the length of a horn and inversely related to measurement distance. An empirically derived error-distance equation estimates the error. In general, far-field performance for many horns can be obtained at a measurement distance of approximately eight times the length of the horn.
https://www.aes.org/e-lib/browse.cfm?elib=7312
Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!
This paper costs $33 for non-members and is free for AES members and E-Library subscribers.
Learn more about the AES E-Library
Start a discussion about this paper!
