Each subject’s immediate environment was continuously monitored
using a sound meter and infrared camera synchronized to the PSG.
In addition to background sound intensity, the magnitude, source, and
disruptive effect of each abrupt sound elevation above 10 dB(A)
(A-weighted decibel scale) was recorded. Each interaction between the
patient and a member of the critical care team, sleep technician, or
visitor that occurred during sleep was classified by type, and its effect
on sleep continuity was documented.
Each subject’s immediate environment was continuously monitoredusing a sound meter and infrared camera synchronized to the PSG. In addition to background sound intensity, the magnitude, source, anddisruptive effect of each abrupt sound elevation above 10 dB(A)(A-weighted decibel scale) was recorded. Each interaction between thepatient and a member of the critical care team, sleep technician, orvisitor that occurred during sleep was classified by type, and its effecton sleep continuity was documented.
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