Finger pulse wave amplitude response during sleep to environmental noise
* Presenting author
Changes in finger pulse wave amplitude (PWA) as measured by photoplethysmography might be a sensitive marker of sleep fragmentation caused by an environmental noise. This marker has been shown to be a sensitive marker of autonomic arousals with great clinical potential due to its simplicity and ease of measurement. In this study we investigated the finger PWA in response to several types of environmental noise up to 48 dBA sound pressure level. The study was done on 20 young participants over two consecutive noise exposure nights. We found no significant differences between sound pressure level and finger PWA size with respect to the control for any noise type. These results thus suggest that environmental noise at SPL of 48 dBA or lower does not evoke autonomic system arousals above the spontaneous rate and is hence unlikely for that noise to have any long-term effects on cardiovascular health.