Why are fireplace sounds relaxing?
Fireplace sounds feel relaxing because they are warm, irregular and soft: a steady hiss under a gentle crackle gives the ear something to follow without demanding attention.

Crackling Fireplace Ambience for Sleeping • Black Screen • 12H
The hiss is escaping gas and moving air, and it stays even. The crackle is wood popping as it dries and cracks, so it comes at random moments. That mix is lively enough not to be boring and gentle enough not to alarm you.
For many people fire is also linked with warmth, safety and the end of the day, and that association is probably part of the effect. Research on fireplace sound itself is limited, so this is a likely explanation, not a proven one.
Our fireplace recordings are real fires. In the lakeside one, someone stayed awake to keep feeding the fire, which is why the crackle never thins out. Behind it you can hear the lake, a little wind and summer insects. If sharp pops wake you at night, try rain or a river instead. Three of our fire recordings are below.
Quick questions
Is fireplace sound the same as white noise?
No. It has a steady hiss, but the crackle makes it far more irregular than white noise.
Can I sleep to fireplace sounds?
Yes, many people do. Keep the volume low and use a long recording.

