Ultimate Relaxing Rain Sounds with black screen.Sounds of rain and thunder for sleep - Goodbye insomnia - Rain sounds for sleeping,heavy rain and thunderwill make you fall into deep sleep . Relaxing rain music for relaxation,meditation,study.reading,massage,spa or sleep. Studies have shown that natural sounds, such as rain, can create a relaxing environment and promote a deeper sleep. Sleep research found that exposure to nature sounds - including rain - reduce stress levels and improve sleep quality.