[Evaluation of afternoon sleep of children in nurseries and nursery schools with different acoustic conditions].
The main aim of this study was assessment of the sleep conditions of children in educational-caring institutions. The sleep was considered as one of the elementary needs of the young organism. During a continuous observation of 2505 children sleeping after lunch under different acoustic conditions sleep disturbances were noted caused by noise. The disturbances included prolonged time of falling asleep, increased number of awakening episodes, difficulties in falling asleep again, shortening of the sleep time, and increased number of movements of the trunk and extremities. A significant change of these indices occurred with increased amount of equivalent noise A above 65 dB outside the house. Less significant changes were observed at lower noise levels. Considering the results of this study, the areas with noise level exceeding 60 dB (A) should be regarded as unsuitable for construction of such institutions.
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D002675:Child, Preschool; D002940:Circadian Rhythm; D006801:Humans; D007223:Infant; D009622:Noise / Q000009:adverse effects*; D009724:Nurseries, Infant / Q000592:standards*; D011044:Poland; D012578:Schools, Nursery / Q000592:standards*; D012890:Sleep / Q000502:physiology*; D012893:Sleep Wake Disorders / Q000209:etiology*
Ocena snu poobiedniego dzieci w złobkach i przedszkolach o zróznicowanych warunkach akustycznych.