White Noise

 https://www.medicalnewstoday.com/articles/white-noise-apps#how-they-work

• rain on a tent
• natural waterfall
• distant thunder
• fireplace
• fan noise
• sleeping dragon

  Background sounds that may disturb a person’s sleep include:

• slamming doors
• snoring or coughing
• animal noises
• traffic sounds and sirens
• creaking floorboards
• hotel elevator doors or ice machines
• conversations or laughter
• dripping water
• leaf blowers
• cutting up a dead body with a saw