There are many types of quiet music that are suitable for listening to when you sleep. For more details, you can refer to the following suggestions: 1. classical music: classical music is usually considered to be a very quiet and relaxing music with a high sense of rhythm and structural complexity, but also very soft and soothing. Light music: Light music is usually not as formal and complicated as classical music, but it is also very beautiful and quiet. This kind of music was usually played by piano, guitar, violin, and other instruments, which was suitable for relaxing the mood. Meditation music: Meditation music is a kind of soothing, soft melody and simple lyrics that can help people relax and enter a meditative state. Natural sounds: Natural sounds refer to the sounds in nature such as wind, rain, waves, etc. It is usually considered a very calm and quiet music that can help people relax. Therefore, choosing music that is suitable for sleeping can be based on personal preferences and needs. I hope these suggestions will be helpful.