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. 2019 Jul 24;16(15):2649. doi: 10.3390/ijerph16152649

Figure 3.

Figure 3

Time-dependent changes in the oxy-hemoglobin (oxy-Hb) concentrations in the right (a) and left (b) prefrontal cortex during 60 s exposure to the forest vs. city sounds. Data are expressed as mean ± standard error (n = 29).