A Loudspeaker Horn that Covers a Flat Rectangular Area from an Oblique Angle

Keele J,DB(. A Loudspeaker Horn that Covers a Flat Rectangular Area from an Oblique Angle. In: AES Convention 74. Audio Engineering Society; 1983. Paper 2052. Available from: https://aes.org/publications/elibrary-page/?id=11712

@inproceedings{Keele1983_11712,
  author = {Keele, Jr., D. B. (Don)},
  title = {{A Loudspeaker Horn that Covers a Flat Rectangular Area from an Oblique Angle}},
  booktitle = {AES Convention 74},
  note = {Paper 2052},
  year = {1983},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=11712}
}

TY  - CPAPER
TI  - A Loudspeaker Horn that Covers a Flat Rectangular Area from an Oblique Angle
AU  - Keele, Jr., D. B. (Don)
T2  - AES Convention 74
M1  - Paper 2052
PY  - 1983
DA  - 1983/10/06
UR  - https://aes.org/publications/elibrary-page/?id=11712
PB  - Audio Engineering Society
LA  - en
AB  - A constant-directivity defined-coverage loudspeaker horn that approximately covers a flat rectangular area from an oblique angle is described. The horn compensates roughly for the inverse rolloff of sound pressure in the forward-backward direction by varying the horizontal coverage as a function of the elevation angle. The horizontal coverage angle of the horn at the 6-db-down points at each elevation angle is matched to the required horizontal angle of the rectangular area as seen by the horn. Measurements on a prototype horn which covers a two by three unit area from a point one unit above the center of the narrow end are shown. This horn roughly covers a 70-deg vertical angle with the horizontal coverage smoothly changing from 90 deg at 0-deg elevation (straight down) to 38 deg at 70-deg elevation.
ER  -