What is "pink noise"?

While we call it “white noise” because that’s the term used by most of our customers, our Dohm products are actually creating “pink noise.” If you sample various “colors” of sounds, you will quickly hear that actual “white noise” is highly annoying and not conducive to sleep. Our Marpac Signature Sound contains less high frequency content than “true” (“scientifically defined”) white noise, and also less than most competing sound machine models on the market. The ear is more sensitive to high frequency sounds, so it perceives our sound as more soothing.

What is "white noise"?

White noise is a constant sound which can block out noises across a wide range of frequencies, steadily and at a lower volume than non-white noise. What our years of experience have taught us is that all white noise is not created equal, and we strive to make ours the best.

Which product is loudest?

For sheer power and volume, the 1288A (not available in Singapore Market) is our loudest machine. This is available primarily through audiologists and has a decibel range up to 90 DB. It has in-line volume control, so the volume range starts at zero and goes up (obviously) from there.

Next in line are the portable (but powerful!) Rohm and Hushh units. These are readily available at retail, and they are small but mighty, ranging from zero to 85 dB.

The Dohm products – all of the products which feature a fan inside – have a volume range between 50-75 dB. This masks the majority of the quiet but annoying noises that disrupt our sleep, as well as some louder, more obnoxious tones.

If you’d like a little more information, here’s a quick product comparison.

Do you give away products?

We do, sometimes. We love helping people give sleep a chance. But… we have some guidelines. If you’re a non-profit, an influencer, or a member of the media, please check out this page to get in touch with the right people.

Can my product be used internationally?

If you’re on the road (or in the sky) frequently, we’d recommend the Rohm or Hushh – their compact size and compatibility with power sources around the world makes these units your best option.

We do also hear from plenty of people who like to take their Dohm along while traveling.  Please be aware that because there’s a small motor inside, the 240V Dohm does not like to travel internationally.  We do manufacture 120 V (USA) Dohms.

What is a "sound machine"?

Sound machines produce a consistent sound which masks disruptive noises and helps soothe people to sleep. We like to say that our sound machines are “noise-reducing, sleep-inducing” magic. Turn one on, and tune everything else out.

Which product is best for me?

Well, it really depends on your sound preferences and your needs.

In a nutshell: the Dohm has been our most popular and best-selling model since its invention in 1962, and many people swear by its naturally soothing sound. If you need more volume, more portability, or more sound choices, you’ll want to look at some of our other models.

Here’s a quick product comparison.

What is the battery life of the rechargeable products?

A full charge on the Hushh will last anywhere from 4 – 22 hours, depending upon which setting you’re using. Please note that the nightlight uses much more battery power than the sound, and that higher volume = faster battery drain.

A full charge on the Rohm will last anywhere from 10 – 22 hours. (This is because Rohm does not feature a nightlight.) Again, louder volume = more battery drain.

It is also possible to run these units while they are plugged in.