White noise machine vs earplugs

Short answer: earplugs if a specific loud sound is waking you and you can tolerate something in your ears; a sound machine if the problem is unpredictable intrusions, if you share a bed, or if you need to hear an alarm or a child. Plugs are far cheaper and reduce more sound - foam plugs are rated as high as NRR 33 dB - but they also attenuate your alarm, and the attenuation is weakest exactly where snoring sits. A machine changes nothing about what reaches your ear; it changes whether your brain notices it.

This is the real first decision in the whole sound category, and most buying guides skip it by assuming you already made it. The two approaches do not stack, they do not substitute neatly for each other, and picking wrong is how people end up owning both and still being woken up.

Masking and blocking are opposite strategies

Blocking reduces the sound energy reaching your eardrum. A foam plug physically obstructs the canal, and the rating on the box - NRR in the US - describes how much attenuation it delivers under laboratory conditions. Everything gets quieter: the snoring, the street, your partner, and your 6:30 alarm.

Masking adds steady, featureless sound so that an intrusive sound no longer stands out against the background. Nothing is removed. The door still closes; it just stops being the loudest event in a quiet room. The reason this works at all is that sleep is disrupted more by sudden changes in sound than by absolute level - research on brain rhythms and noise tolerance points in that direction, and the WHO’s night-noise guidance treats event-based disturbance as the thing to manage.

That single difference drives everything below.

Which wins, problem by problem

The NRR number is smaller than it looks

Foam plugs publish impressive figures - Mack’s rates its Ultra Soft at NRR 33 dB, the highest in common consumer use. Two caveats before you trust it.

First, real-world attenuation is lower than the label. NIOSH recommends derating published NRR figures precisely because laboratory fit is better than the fit most people achieve. A plug half-inserted does a fraction of its rated job.

Second, the rating is a single number across the whole spectrum, and attenuation is not even. Plugs do well against high frequencies and poorly against low ones - which is why acoustics researchers have gone as far as building resonators into earplugs to improve the low end. Snoring is low-frequency. Johns Hopkins work treating snoring as a noise exposure makes the same point from the other direction.

So the honest framing: a 33 dB plug is a very good tool against a motorway and a moderately disappointing one against the person beside you. We have a page specifically about that gap.

Why using both usually backfires

It seems obvious: block what you can, mask the rest. In practice it goes wrong more often than it works, for a reason that is easy to miss.

Plugs attenuate your masking sound along with everything else - and they attenuate it most in the high frequencies, which is where white noise does its covering work. You end up having to run the machine louder to get the same masking through the plugs, and a louder machine is a worse machine for your ears and for anyone else in the room.

The combination that does work is a machine plus low-rated comfort plugs, where you are shaving the peaks rather than sealing the canal. Loop publishes 21 dB NRR on the Dream, which is deliberately modest - and independent reporting on it focuses on side-sleeping comfort rather than maximum blocking. That is the right shape of plug to pair with a machine.

And if the reason you want plugs is that you need to still hear something, that specific trade-off has its own page.

The free version of each

Before you buy either, two experiments cost nothing. For masking: run a bathroom fan or a desk fan for a night, which is genuinely what a fan-versus-machine comparison is about, and see if steady noise is the thing that helps you. For blocking: move the bed to the wall furthest from the noise. Distance is free attenuation and it works on every frequency.

The verdict

If you can wear plugs and your noise is steady and high-frequency, plugs are the cheaper and more effective purchase, and it is not close. For everything else - unpredictable intrusions, snoring, tinnitus, needing to hear an alarm, a partner who objects to things in their ears - the machine is the right tool, and the main roundup is where to pick one.

What we would not do is buy both on the first attempt. Pick the mechanism that matches your noise, give it a week, and buy the other one only if you can say exactly what the first one failed to cover.