Directivity Pattern

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directivity pattern

[də‚rek′tiv·əd·ə ‚pad·ərn]
(engineering acoustics)
A graphical or other description of the response of a transducer used for sound emission or reception as a function of the direction of the transmitted or incident sound waves in a specified plane and at a specified frequency. Also known as beam pattern; directional response pattern.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Directivity Pattern


(1) For a transmitting antenna, a graphic representation in polar coordinates of the dependence of the electric field strength of the radiated wave on the direction of radiation (assuming that the field strength is measured at a large and constant distance from the antenna).

(2) For a receiving antenna, a graphic representation in polar coordinates of the dependence of the electromotive force induced in the antenna on the direction of the incident wave (given a field strength at the antenna location that is equal for all waves incident from any direction).

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
For such a line source of radiation, the directivity pattern is given by a Fourier transform[2-4] as
In [4], high-order differential microphone arrays are employed to design directivity patterns that emulate stereophonic panning laws.
Caption: Figure 14: Noise directivity pattern at the BPF: (a) R =1 m; (b) R = 5 m; (c) R = 3 m.
Nevertheless, to obtain similar directivity patterns the lens design are considered as much longer wavelength involved in comparison with the FSS design.
Furthermore, the directivity patterns are calculated in the xy, xz, and yz Plane cuts at 402 MHz and 2.4 GHz.
Palmer, "Directivity patterns of laser-generated ultrasound in aluminum", J.
As seen from Figure 12, the proposed antenna has directivity patterns with high gain and the range of the half-power bandwidth (HPBW) is between 30 and 120.
Directivity patterns were compared in [23] for uniform and stepped-thickness plates and raising the steps to half a wave length of the radiated sound in the medium affected the directivity and strength of the ultrasound generation.

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