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Figure 6


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Results of the echo threshold level (filled symbols) and the masked threshold level (open symbols) given as means and 95% confidence intervals. The influence of the scattering coefficient s is examined with conditions A s , the influence of the angle θ 0 is examined with conditions A 1, B 1, C 1, and the influence of the directional spread is examined with the hybrid condition A , which combines the temporal characteristics of a diffuse reflection with the directional characteristics of a specular reflection. For all conditions the delay is constant with ΔT = 20 ms.

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