Event-related potentials (ERPs) provide an exquisite means to measure the extent of processing of external stimuli during the sleep period. This study examines ERPs elicited by stimuli with physical characteristics akin to environmental noise encountered during sleep. Brief duration 40. 60 or 80 dB sound pressure level (SPL) tones were presented either rapidly (on average every two se... https://mabelandfoxs.shop/product-category/sound-book/