Practical guide

How loud should a sound machine be?

Low enough that it fades into the background, high enough to soften the changing sound you are trying to mask—and never so loud that it feels like another disturbance.

Prepared by Bedtime Cues Editorial Team · Evidence reviewed 19 September 2026 · General education, not medical review

The short answer

Use the lowest comfortable volume that meets your purpose.

The best sound-machine setting depends on the room, the outside noise, your hearing and the device. It is not sensible to copy a single online volume number. A major review of continuous sleep noise found both potential benefits and potential disruption, and specifically noted the need to consider hearing as well as sleep.[1]

Distance matters

Place the device away from your head rather than on the bedside table beside your ear. Test the sound from where you actually sleep, not only while standing beside the machine.

Volume is not the only tool

Close a window, use a door draft stopper, change the device position or mask only the period when noise is worst. Turning the sound up is rarely the first answer.

A simple setup process

Set it once, then let it disappear.

Begin lower than you thinkStart where the sound is clearly audible but not dominant. Sit or lie in your normal sleeping position before adjusting.

Listen for maskingIf the sudden traffic, voices or appliance noise feels less sharp, the setting may be doing its job. If the machine itself is the most noticeable sound, reduce it.

Use a timer when suitableSome people only need steady sound while settling. Others prefer it through the night. Trial one approach at a time rather than changing every setting at once.

What public guidance can and cannot tell you

Bedroom-noise guidelines are not a device prescription.

The World Health Organization’s community-noise guidance discusses night-time bedroom noise and environmental noise exposure; it does not set a universal volume for your sound machine.[2] Use those guidelines as context for taking noise seriously, not as a reason to run an artificial sound louder than necessary.

Frequently asked questions

Sound-machine volume FAQs

Can a sound machine be too loud?

Yes. If it feels intrusive, makes conversation or an alarm difficult to hear, causes discomfort or becomes a new focus of attention, lower it or stop using it.

Should I put it next to the bed?

Usually no. A little distance gives the sound space to blend into the room and avoids directing it straight at your ears.

References

Sources cited in this article

Riedy SM, Smith MG, Rocha S, Basner M. Noise as a sleep aid: A systematic review. Sleep Medicine Reviews. 2021;55:101385. doi: 10.1016/j.smrv.2020.101385. PMID: 33007706.
World Health Organization Regional Office for Europe. Environmental noise guidelines for the European Region. 2018. Read the guideline.