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Figure 2. Sleep disturbances due to noise – relative reaction frequencies and noise levels. The results of Steinicke (1957) and Gädeke et al. (1969) are disregarded. In both investigations longer lasting noises were offered. (Reference: see (Griefahn et al. 1976)).

Figure 2. Sleep disturbances due to noise – relative reaction frequencies and noise levels. The results of
Steinicke (1957) and Gädeke et al. (1969) are disregarded. In both investigations longer lasting noises
were offered. (Reference: see (Griefahn et al. 1976)).