. Elements of acoustical engineering. Electro-acoustics; Sound. ^ V K '">! % y lX -— ^ ^ <^ — ^ / /'\ X X. Fig. A— a spherical radiating surface consisting of 15 individual exponential horns. 5 — geometry for predicting the directional characteristics of a cluster of small horns. dividual horn and the geometrical configuration of the assembly of horns. Assume that the point of observation is located on the OF axis, Fig. , at a distance several times the length of the horn. The amplitude of the vector contributed by an individual horn for the angle ^ can be deter- mined fr
. Elements of acoustical engineering. Electro-acoustics; Sound. ^ V K '">! % y lX -— ^ ^ <^ — ^ / /'\ X X. Fig. A— a spherical radiating surface consisting of 15 individual exponential horns. 5 — geometry for predicting the directional characteristics of a cluster of small horns. dividual horn and the geometrical configuration of the assembly of horns. Assume that the point of observation is located on the OF axis, Fig. , at a distance several times the length of the horn. The amplitude of the vector contributed by an individual horn for the angle ^ can be deter- mined from its individual directional characteristic. In this illustration, the plane XOZ is chosen as reference plane for the phase of the vector. The phase angle of the vector associated with an individual horn is -360° X "Wente, E. C, and Thuras, A. L., Jour. A. I. E. E., Vol. 53, No. 1, p. 17, 1934. isHilliard, J. K., Tech. Bull. Acad. Res. Council, March, 1936. " Olson, H. F., RCA Review, Vol. 1, No. 4, p. 68, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Olson, Harry Ferdinand, 1901-. New York, D. Van Nostrand company, inc.
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