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. 2011 Mar 1;34(3):355–362. doi: 10.1093/sleep/34.3.355

Table 5.

Environmental noise and light data during the daytime and nighttime

Night Day
Noise
    EqL (dB) 49.5 ± 1.08 57.9 ± 0.95
    Lmin(dB) 42.3 ± 4.5 42.9 ± 5
    L95 (dB) 44.3 ± 3.75 46.3 ± 4.7
    L5 (dB) 49 ± 3.5 60.8 ± 8.41
    Lmax (dB) 68.7 ± 1.77 78.8 ± 0.28
    N. peaks > 50dB (ev/h) 21.8 ± 19.8
    N. peaks > 80dB (ev/h) < 1 17.8 ± 14.2
Light
    Mean (lux) 2.5 ± 0.5 107.1 ± 45
    Mean minimum (lux) 1.3 ± 0.9 2.29 ± 0.6
    Mean maximum (lux) 47.3 ± 34.0 524.1 ± 751.3

EqL, equivalent level; L95, sound threshold exceeded for more than 95% of the duration of the measurement; L5, sound threshold exceed for 5% of the duration of the measurement; Lmin and Lmax, minimum and maximum level of noise.