"Sleep Sound" is an application designed to help users improve the quality of sleep through sound. Here is a detailed description of this application: Natural sounds: Including rain, ocean waves, streams, wind blowing through trees, and birds chirping. Environmental sounds: Airplanes, fans, engines, cars, and pedestrians. Sound Playback Mode: Repeat mode: People Timer: T Blending mode: Allows users to combine different sounds to create a unique and personalized sound environment.