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Actual loudspeaker positioning errors. Histograms display the shape and variance of radial, azimuth, zenith and great circle central angle errors, ϵ R , ϵ φ , ϵ ϑ and ϵ γ , respectively. Dots and error bars represent mean μ and standard deviation σ, respectively. The loudspeakers were delayed to match a nominal virtual array radius of 1.44 m.
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