This marvelous device allows deep, full sleep, even when disturbing noises are present. It creates "white noise" ( a soothing muliti-frequency WHOOSH) which relaxes you and blocks out other noises. Spouse snoring, traffic, TV, neighbors, etc. no longer are a problem. Wonderful for insomniacs. Also helps you read or study - good for college dormitory rooms. Same "white noise" being used in large corporations to provide quiet office working environment. Made by the pioneer in sound conditioning.