THE POLAR CHARACTERISTIC OF AN ACOUSTIC PARABOLIC REFLECTOR

Violeta Stojanović, Zoran Milivojevic

DOI Number
https://doi.org/10.22190/FUWLEP241003028S
First page
293
Last page
303

Abstract


The first part of the paper presents the geometry of the acoustic parabolic reflector. After that, analytical formulas for calculating the amplification and polar characteristics of the reflector are shown. The second part of the paper describes the experiment in which measurements were made and the acoustic characteristics of the parabolic reflector located in the yard of the Academy of Applied Technical and Preschool Studies, Department of Niš, in Niš were calculated. First, acoustic impulse responses for acoustic excitation at angles from -90° to 90° were measured. After that, the polar characteristic of the radiation was calculated. Finally, the beamwidth of the radiation, beam solid angle of the radiation, and directivity of the acoustic parabolic reflector were determined. The results of the experiment are presented numerically and graphically.

Keywords

impulse Response, polar characteristic, directivity

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References


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DOI: https://doi.org/10.22190/FUWLEP241003028S

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ISSN   0354-804X (Print)

ISSN   2406-0534 (Online)