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. 2018 Feb 7;18(2):495. doi: 10.3390/s18020495

Figure 5.

Figure 5

Mean (μ) ± standard variation (σ) of the delay time between sensors: (a) Mean (μ) ± standard variation (σ) of the delay time between Sensor 2 and Sensor 3, (b) Mean (μ) ± standard variation (σ) of the delay time between Sensor 2 and Sensor 4.