Archive image from page 7 of Directivity function of a general Directivity function of a general receiving array for spherical and plane sound waves directivityfunct00warn Year: 1961 x. coscc+z/. cosB+. COS 7 2/ ~b ~U SOURCE D(xo , yo, 20) ELEMENT WAVE FRONT Figure 1. Rectangular coordinate system showing a source and a spherical wavefront passing through a typical element of a general array.

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