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Figure 11. Mean values of two sleep-related parameters during nights with 0, 16 and 64 events. Left: sleep quality and right: time to fall asleep. : 60 d(A) ; : 50 dB(A); :45 dB(A). From (Öhrström, 1995).

Figure 11. Mean values of two sleep-related parameters during nights with 0, 16 and 64 events. Left:
sleep quality and right: time to fall asleep. : 60 d(A) ; : 50 dB(A);
:45 dB(A). From (Öhrström, 1995).