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Figure 4 The relative risk of the onset of motility due to night-time noise estimated from Lnight and N60. N60 was set to 10, 25, 50, 100, and 150. The relative risk in Lnight ≤ 43.2 dB was shown as 1.

Figure 4 The relative risk of the onset of motility due to night-time noise estimated from <i>L</i><sub>night</sub> and <i>N</i><sub>60</sub>. <i>N</i><sub>60</sub> was set to 10, 25, 50, 100, and 150. The relative risk in <i>L</i><sub>night</sub> ≤ 43.2 dB was shown as 1.