how loud should brown noise actually be when you're working?

what exactly is brown noise?

you've probably heard of white noise, which sounds like tv static or a hissing radio. brown noise is its deeper, rumblier cousin. it's got more low-frequency energy, making it sound more like a strong waterfall, a deep river current, or a constant low rumble.

think of it as a gentler, less 'trebly' sound than white noise. many people find it more soothing and less abrasive. for those of us with ADHD or anyone easily distracted, it can act like an acoustic blanket, covering up sudden noises and giving the brain something consistent to latch onto.

the theory: moderate brain arousal and sound

the idea that background noise can help focus isn't just a hunch. it's got some theoretical backing, especially for ADHD brains.

researchers like Söderlund & Sikström at Stockholm University have explored the moderate brain arousal model. the basic concept is that some brains, particularly those with ADHD, might benefit from a specific level of external stimulation to reach an optimal state for attention.

too little stimulation, and the brain might wander off looking for excitement. too much, and it gets overwhelmed. brown noise, at the right volume, can theoretically provide that 'just right' amount of arousal, helping the brain settle down and focus on the task at hand. it's like finding the perfect temperature for a cup of coffee; not too hot, not too cold.

what the research says (mostly about white noise)

i'm going to be honest: while brown noise is popular, much of the actual scientific research on noise and ADHD focuses on white noise. studies by Söderlund & Sikström, for example, have shown that white noise can improve attention and memory in some individuals with ADHD.

a 2024 systematic review and meta-analysis from Oregon Health & Science University (OHSU) pooled many of these white noise ADHD studies. they found some positive effects, but the results were often modest, and there was a lot of variability between individuals. in other words, it's not a magic bullet, and what works for one person might not work for another.

specific, large-scale studies on brown noise and focus are a bit thinner on the ground. however, the anecdotal evidence is strong, and the underlying principles of sound masking and moderate brain arousal likely apply across different noise colors.

the goldilocks principle: not too loud, not too soft

so, back to the big question: how loud should it be? the simple answer is: just right for you. there's no universal decibel level that works for everyone, or even for the same person every day.

the goal is to create an auditory environment where the brown noise is present enough to mask distracting sounds, both external (that noisy coworker, traffic outside) and internal (your own whirring thoughts), but not so loud that it becomes a distraction itself.

if it's too quiet, it won't be effective at creating that consistent sound barrier. if it's too loud, it can cause auditory fatigue, become irritating, and might even pose a risk to your hearing over long periods. we don't want to trade one distraction for another, or worse, cause damage.

a starting point: aiming for masking, not blasting

i usually suggest starting with brown noise at a relatively low volume. think of it like turning on a fan in the background. you notice it at first, but then it fades into the background, providing a subtle hum without drawing your attention.

if you want a rough guideline, consider aiming for a volume similar to a quiet office or a refrigerator hum, maybe 40-50 dB. if your environment is particularly noisy, you might need to go a bit higher, perhaps to the level of a normal conversation, around 60-70 dB, but be cautious with prolonged exposure at higher volumes.

the best way to test is to play it and then try to ignore it. if your brain settles and you find yourself less bothered by other noises, you're probably in a good spot. if you're constantly aware of the brown noise itself, or if it feels like it's competing for your attention, dial it down. your ears (and your brain) will tell you.

listen to your brain (and your ears, for real)

ultimately, this is about self-experimentation. we built focus cave to give you tools to find what works for you, not tell you what magic setting you need. what helps you focus one day might be different the next, depending on your energy levels, the specific task, or how much sleep you got.

does the brown noise help you get into a state of 'flow'? does it feel like it smooths out the edges of your environment, making it easier to concentrate? that's the real test. don't get hung up on exact decibel numbers or what some expert claims. trust your own experience.

and please, be mindful of your hearing health. prolonged exposure to loud sounds, even white or brown noise, can be detrimental. keep the volume at a comfortable level that allows you to hear if someone calls your name, or a fire alarm goes off. you're looking for a helpful tool, not a full sensory deprivation chamber.

there's no single 'right' answer for brown noise loudness, but it's not about blasting it. it's about finding that sweet spot where it becomes a calming, consistent backdrop, helping your unique brain do its thing.

find your perfect brown noise volume right now on the focus cave homepage.