What Is Green Noise & Is It As Soothing As Real Nature Sounds?

Step aside, funny cat clips and music videos: YouTube channels around the world are increasingly filled with the sights and sounds of nature.

"Green noise" is a manufactured sound that has a frequency that reminds some people of what they'd hear in nature.

As Daniel Bowling, Ph.D., acoustics researcher and neuroscience adviser at Spiritune, previously explained to mindbodygreen, in nature, higher frequencies are less common than lower frequencies. Green noise emulates this natural sound distribution—it falls somewhere between white noise (which has an even distribution of high and low frequencies) and brown noise (which is heavily weighted to low frequencies).

Green noise tends to sound relatively deep with minimal static or high-pitched noise. (Tune into a few examples here and here.)

While virtual soundscapes can evoke some of the feelings we have in nature, they really can't compare to the real deal.

"There is no replacement for nature," says Rachel Buxton, Ph.D., a soundscape researcher and assistant professor at the Institute of Environmental Science and Department of Biology at Carleton University. "We need nature in so many ways—and there are so many things about nature that you're not getting when you're just listening to a recording."

When we visit a waterfall up close, for example, not only will we take in its powerful sounds, but we'll also benefit from the striking sight of the water, the refreshing feeling of the mist on our skin, and the pleasant smell of the damp earth. Even unseen entities—like the organic compounds in the trees9 and microbes in the soil10—can quietly conspire to improve our mood, immune response, and more.

Research supports the fact that in-person nature sounds are preferable to recorded ones. In one experiment out of the University of Illinois at Urbana-Champaign, healthy undergraduates either sat in an outdoor forest setting or watched a 360-degree VR nature recording of the same environment for six minutes. While the VR headset improved mood11 more than sitting in an empty room, it didn't have as positive of an impact as the outdoor exposure. Daily exposure to virtual nature12 also doesn't seem to inhibit rumination or negative thought loops, while real nature definitely does.

In a recent meta-analysis, Buxton and other researchers reviewed literature on the health benefits of different natural sounds in national parks. Of the sounds surveyed, water sounds had the largest positive impact on health and mood outcomes.

When I asked a study co-author Amber L. Pearson, Ph.D., a health geographer at Michigan State University, why that might be, she said it could have to do with the evolutionary appeal of the water. "There are some theories that we associate water sounds with key resources that we've always needed for human survival. And so it's sort of hardwired into our brain: "[Water sounds] are a positive thing," she says.

Soundwalking is exactly what it sounds like: walking with the intention of paying attention to the sounds around you. The practice can help you tune in to how soundscapes change from one place to another. What you hear at the start of your walk will likely be totally different from what you hear at the end.

In Pearson and Buxton's analysis, the sounds of birds also seemed to be very beneficial for stress relief. Other studies have shown that listening to birdsong can alleviate anxiety and paranoia13.

Again, there could be an evolutionary component to this: Birdsongs send a subconscious signal that you're in an area that has the resources necessary to support life. "When you don't hear birds, that's because they are feeling threatened, and so they go quiet," says Pearson. "When everything was perfectly silent, it can actually can be considered threatening."

Another way to tune into the green noise that exists all around you is to close your eyes and visualize that you are standing in a snow globe. Preferably, you can do this in an area that isn't super loud with construction noise or honking. A forest environment is ideal for this practice (that's where I was when I first fell in love with it), but a public park or your backyard will work, too.

With your eyes closed and ears open, listen for the nature sound that you can hear the most clearly and is the closest to you. Then, listen for the one that is the farthest away. Latch on to this sound, this "green noise," and imagine that it is hitting the glass of the contained snow globe. Sit with this sound for as long as it takes you to wind down and feel more at peace.

Green noise is a specific frequency of noise thought to emulate the sounds of nature. It hasn't been scientifically studied, but there's some reason to believe that it can help promote sleep, enhance attention, and relieve stress. That said, it can't stand in for the sounds of nature or replace our inherent human need to engage with the natural world.