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Two-hour section of a time history graph from sound level measurement with dosimeter carried by a midwife during a sample night shift in the obstetrics ward. Equivalent sound level during the entire shift was 84 dB LAeq (10 h) and 118.7 dB LAFmax was the highest recorded during the shift (shown in the selected section). According to the written log, the midwife attended a delivery during 22:30–23:05. Black curve showing the dB LAeq and grey curve showing dB LAFmax.
