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Figure 2: Method of computation of the physiological attenuation. Unoccluded condition results are represented by the lines with “▲” markers and occluded condition results by the lines with “▪” markers. The straight lines D and D′ are obtained from linear least-squares regressions for each condition

Figure 2: Method of computation of the physiological attenuation. Unoccluded condition results are represented by the lines with “▲” markers and occluded condition results by the lines with “▪” markers. The straight lines D and D′ are obtained from linear least-squares regressions for each condition