Evie Summers
White noise is a combination of various sounds at different frequencies that are audible to the human ear. It can often sound like hissing or a shhhh sound, similar to television or radio static. White noise machines can help people sleep by blocking out outside sounds and masking disruptive sounds. White noise is loud enough to drown out distractions but constant enough that, after a few minutes, the brain starts to ignore it, allowing you to sleep.
| Characteristics | Values |
|---|---|
| Type of sound | White noise, pink noise, brown noise, green noise |
| How it helps | Masks other sounds, creates a buffer, blocks out noise |
| Effect on brain | Reduces attention to other sounds, filters out constant sounds |
| Benefits | Improved concentration and productivity, better athletic performance, improved judgement and decision-making |
| Use cases | City dwellers, shift workers, people with tinnitus, babies |
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What You'll Learn
White noise helps to mask other sounds
White noise is a combination of various sounds at different frequencies that are audible to the human ear. It often sounds like hissing or a "shhhh" sound, similar to television or radio static. White noise machines provide a steady, continuous noise that blocks out other sounds, such as sirens, barking dogs, or a roommate's TV. This is called "sound masking".
Our brains are constantly processing the noises around us, trying to distinguish specific noises that are meaningful to us from environmental "background" noise. For example, if a co-worker starts typing on their keyboard, that would grab your attention. But if they've been constantly typing for an hour or two, your brain would likely process that as background noise.
When you add white noise to your environment, any incidental noises would be less jarring and attention-grabbing to your brain, and would just sound like part of that background. White noise is loud enough to drown out any potential distractions to your sleep, but it's constant enough that after a few minutes, your brain more or less ignores it, and you can sleep as a result.
White noise can also help people who suffer from tinnitus, a constant ringing in the ears, by providing a neutral sound that can minimise disturbances and help them sleep better.
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It can block out environmental noise
White noise can block out environmental noise and help you sleep. It can be a very effective tool for those who live in noisy areas, such as near an airport or a busy road. White noise machines provide a steady, continuous sound that acts as a buffer between your eardrums and disruptive noises in your environment. This includes things like sirens, barking dogs, or a roommate's TV.
Our brains are wired to pay attention to sharp changes in our surroundings, as these could indicate a potential threat. White noise helps to mask these unexpected sounds, introducing a calm and gentle background noise that prevents you from being startled awake. It can also help to muffle more constant noises, such as a partner's snoring, which may otherwise keep you awake.
White noise can be particularly useful if you live in a city, where traffic, neighbourhood noises, and aircraft sounds can disrupt your sleep. It can also be beneficial for those who work night shifts and need to sleep during the day, or those with housemates on different schedules.
The use of white noise to aid sleep has been supported by scientific research. A 2021 study found that white noise significantly improved sleep for people in high-noise areas. Similarly, a 2012 study showed that pink noise—which has a deeper, more consistent sound than white noise—increased stable sleep by reducing brain activity.
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White noise can help you fall asleep faster
Masking Unpleasant Noises
White noise is a combination of various sounds at different frequencies that are audible to the human ear. It often sounds like a hissing or "shhhh" sound, similar to television or radio static. White noise machines or apps produce a steady, continuous noise that blocks out other sounds, such as traffic, neighbourhood noises, aircraft sounds, or a snoring partner. This "sound masking" effect helps to create a calm and consistent auditory environment, allowing you to fall asleep faster and stay asleep by reducing distractions and unexpected noises.
Reducing the Impact of Jarring Noises
White noise helps to minimise the impact of jarring or intermittent noises that can easily wake you up. For example, the sound of a passing motorcycle, a coughing roommate, or a car shifting gears. By providing a constant background noise, white noise makes these incidental sounds less attention-grabbing to your brain, allowing you to stay asleep or fall back asleep more easily.
Signalling Sleep Time
Using white noise as part of your bedtime routine can signal to your brain that it's time to sleep. This Pavlovian response can help train your brain to associate white noise with sleep, making it easier to fall asleep when you hear it.
Calming and Relaxing
The consistent and gentle nature of white noise can have a calming and relaxing effect, creating a soothing atmosphere that promotes sleep. Some people find white noise soothing, even in the absence of other distracting noises.
Helping with Tinnitus
For people with tinnitus, white noise can help to mask or drown out the constant ringing or buzzing in their ears, making it easier to fall asleep.
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It can improve sleep quality
White noise can improve sleep quality by masking disruptive sounds. It creates a buffer between outside noise and your eardrums, allowing you to sleep peacefully. White noise machines provide a steady, continuous noise that blocks out other sounds, such as sirens, barking dogs, or a roommate's TV.
Our brains are constantly processing noises, trying to distinguish specific sounds that are meaningful to us from environmental "background" noise. When you add white noise to your environment, any incidental noises are less jarring and attention-grabbing to your brain, and they become part of the background. White noise can make these unexpected noises less likely to disturb your sleep by reducing their ability to grab your attention.
White noise can also help you fall asleep faster. A study found that adults fell asleep 38% faster while listening to white noise. Another study showed that people living in a high-noise area of New York City fell asleep faster and spent more time asleep while listening to white noise.
In addition to improving sleep quality, white noise can also benefit those who work night shifts and need to sleep during the day or those with housemates on different sleep schedules. It can also be useful for people with tinnitus, helping to drown out the ringing in their ears.
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White noise can reduce the impact of sleep disturbances
White noise can be an effective tool to combat sleep disturbances and improve sleep quality. It acts as "sound masking", helping to block out other noises that might disrupt sleep. This is especially useful for people living in noisy urban areas or those with snoring partners. White noise provides a constant, steady sound that, after a while, our brains learn to ignore, allowing us to fall asleep and stay asleep.
Our brains are wired to pay attention to sharp, sudden changes in our environment, as these could signal potential threats. White noise, with its consistent and gentle background noise, helps to disguise these unexpected sounds, reducing their ability to startle us awake. This is particularly effective for intermittent noises, such as a snoring partner or traffic sounds, which can be more disruptive to sleep than constant noises.
Research supports the use of white noise to improve sleep. A 2021 study found that white noise improved sleep for people in high-noise areas of New York City, helping them fall asleep faster and increase their overall sleep duration. Another study from 2012 showed that pink noise, a variation of white noise with more intensity in lower frequencies, increased stable sleep by reducing brain activity.
White noise machines or apps can be used to generate these consistent sounds. When choosing a white noise machine, factors such as cost, sound quality, volume control, and additional features should be considered. While some people may find white noise helpful, it may not work for everyone, and in some cases, it could disturb sleep or impact hearing.
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Frequently asked questions
White noise is a combination of various sounds at different frequencies that are audible to the human ear. It can be used to block out other sounds that may disturb your sleep, such as a snoring partner, traffic, or neighbourhood noises.
White noise is a constant sound that, after a few minutes, your brain starts to ignore. It also helps to drown out any potential distractions or unpredictable noises from the environment that may otherwise wake you up.
White noise has been described as having a hissing or "shhhh" sound, similar to television or radio static.
White noise can help you fall asleep faster and improve your sleep quality by reducing the number of disturbances you experience throughout the night. It can also signal to your brain that it's time to sleep, helping you to establish a healthy bedtime routine.
You can incorporate white noise into your bedtime routine by using a white noise machine or a smartphone app. Set the volume to a level similar to that of a background conversation or light rustling, and consider whether you want the white noise to play all night or just as you fall asleep.
