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Figure 5


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(a) Directivity deviation levels LQ of directivities producing with increasing maximum expansion degree N relative to an expansion incorporating an N = 35 degree expansion. Directivity balloons expanded using up to (b) N = 3, (c) N = 6, (d) N = 10, and (e) N = 15 degree expansion. In all cases, the regularization parameter λ = 0.5.

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