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Loudspeaker Coverage Angle Relationship of the Directivity Index

ZHANG Zhiqiang;MENG Fanjun;Jiangsu Province Electronic Information Products Quality Supervision Inspection Research Institute;  
An approximate measure of the loudspeaker directivity index by loudspeaker coverage angle is a practical,simple and effective approach. From the approximate relationship perspective,it is assumed the measured acoustic energy of the sound source focused approximately by two mutually perpendicular plane coverage angle ∠A and ∠B determinate in the solid angle Ω and used in Ω of the average sound pressure instead of the sound pressure of reference axis. Therefore,the approximate relationship between loudspeaker coverage angle and directivity index have certain deviation in practice.
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