For some, fire may be strange to consider as a type of relaxing sound. But if you’ve ever sat in front of a fireplace, around the campfire, or next to a hot pellet stove, the contained roar and crinkle and warmth can be very relaxing. Imagine a cold winter night next to a hot old-fashioned stove. The mild scent of burning wood, the warmth you can feel going up from your toes to the scalp. You turn the lights off, letting the fire provide the light, and for a moment are taken back to the days when this was the only light for a long night. And you start getting sleepy as you remember that the moment you are in was considered “late night”.