Fig. 6
From: Comparative evaluation of interpolation methods for the directivity of musical instruments
The global error measure Ψ of all six examined directivities of the bassoon plotted individually. The black dashed line represents the triangular interpolation (TrI) error. The solid lines show the reproduction error when interpolating the radiation patterns with the spline approach for M={1,2,3}; the gray dashed lines indicate the error of SH interpolations for N={4,5,...,8}