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Sleep Noise

By Dan LaVine | 07.15.2019

Many adults assume that if they spend eight hours in bed, they are meeting their daily needs for rest and rejuvenation. What they fail to take into account however are the number of times they wake up throughout the night, or the minutes spent tossing and turning under the covers which can seriously cut down on both the quantity and quality of that sleep.

Interrupted sleep refers to sleep that is punctuated by prolonged periods of waking up throughout the night, usually at least four times over the course of eight hours. The condition can be caused by a sudden shift in routine (for example, a new baby in the house), unexpected noises (such as a party at your neighbor’s house or a partner’s snoring), bathroom trips, or racing thoughts.

The Health Fallout;

Interrupted sleep can have negative consequences on your overall health. During the night, your body progresses through different stages of sleep. If one stage is interrupted, your body has to reset and start going through the stages again, meaning you may never get to the deep, restorative sleep that occurs during the later stages of the sleep cycle.

Even just one night of interrupted sleep can negatively affect your mood and cause you to experience a decline in attention span. Interrupted sleep can slow your reaction speed and make it harder to learn or remember things. It can also lead to a buildup of amyloid proteins in the body, which are linked to Alzheimer’s disease.

Finding a Fix;

If you suffer from interrupted sleep, there are lifestyle changes you can implement to try and sustain sleep for longer periods of time. First, try restricting your sleep a little bit. Figure out how many hours you’re actually getting per night, minus any periods of wakefulness, and only allow yourself to be in bed for that long. After cutting down on your sleep, you’ll naturally become sleepier at night, leading you to sleep more deeply.

Next, if you find yourself awake at night for more than fifteen minutes, get out of bed. Go to a quiet, dimly lit couch or comfortable chair, and do a relaxing activity like reading, meditating, or gentle stretching. Once you feel drowsy again, head back to bed.

Finally, stick to your normal wake up time, even if you had a bad night of sleep the night before. Staying consistent with a bedtime and wakeup time will help your body remain in tune with its circadian rhythm, and help your chances of resting peacefully through the night.

How Sound Impacts Your Sleep Cycle;

Whether you are sensitive to bumps in the night or sleep like a rock, sound has the potential to affect your rest and your health.

It’s easy to overlook the significance of sensory cues during rest, as it can seem as though sleep makes us oblivious to the outside world.

However, think back and you can likely recall a time where a sudden sound woke you up or a noisy locale made it hard to doze off. In fact, temperature, smell, light, physical comfort and sound all have the potential to influence sleep according to recent research.

Sound appears to have both positive and negative influences, depending on types, noise level, personal preference and other factors. For example gentle background noise can diffuse a noisy street, while a partner’s snoring or creaky pipes can result in restless nights.

Read on to see how sound influences sleep in both the short-term and long-term, and how to optimize your environment for better nights.

The Effects of Sound During Sleep;

Sounds that are trivial during the day can become bothersome at night, especially when they are abrupt. Even if you don’t fully wake up, noises can arouse you slightly and affect sleep cycles. There are many potential sources of sleep stealing sounds, ranging from things in the home like appliances, televisions, pets and other people, as well as outside sounds like storms, traffic and urban city noise.

One research review published in the Noise & Health journal suggest studies show a link between nighttime environmental noise exposure and cardiovascular disease, and that even low-level noises may impact health due to sleep disturbance.

Environmental noise, from things like road traffic, trains, planes and wind turbines, is a significant policy issue for the World Health Organization. Research in Europe suggests that noise disturbance can cause real health side effects, and the WHO estimates Western Europeans lose one million years of healthy life due to traffic-related noise. Sounds as low as 30 decibels can affect rest, and by comparison, busy traffic comes it at 70 dB while a subway registers 90 dB and an airplane taking off comes in at 100 dB.

The intensity and severity of which noise impacts sleep is somewhat individual though, and some people are more sensitive than others. One study found that brain rhythms play a role in people’s ability to tolerate noise. Generally, noises are most likely to wake people during stage 2 sleep, the light, non-REM cycle we spend about half the night in. Age also factors in, with studies showing children and elderly people to be most vulnerable to sound disruptions.

Emotional noises may perhaps be even more influential, with research showing evidence that mothers are easily woken up by their infants’ movements and that a person’s brain shows more activity to hearing their name than to beeps during sleep.

Over time, people can also become used to, or “habituated to”, noises in their environments, resulting in less effect over time. One study found that people experienced fewer cortical arousals (changes in brain waves) on subsequent days when exposed to traffic sounds at night, however, cardiac arousals (heart rate) did not habituate during the study.

Using Sound to Your Advantage;

Although much of the research focuses on learning about detrimental side effects of sound, it can have a positive affect on sleep as well. Sounds like white noise, for example, can moderate intermittent noise levels and provide a consistent backdrop for more peaceful rest.

Pediatric sleep consultant Jennifer Schindele suggests that environmental noise and new sounds can indeed disrupt sleep, however she finds that sound machines can help both kids and adults sleep well:

“I often find that the addition of low to moderate level white noise can be very helpful to the sleep of my young clients. White noise works to block out normal everyday environmental noises that could cause a person of any age to startle awake or keep them awake in the middle of the night where solid and consistent sleep is needed the most.”

“Finding a good sound machine that offers white noise or gentle rain as sound options can help improve anyone’s sleep. In fact, I often learn that the parents of the children I work with begin to use white noise in their own bedrooms to help improve the quality of their sleep. It is quite remarkable how one small change can make such an incredible difference in the ability of the human body to attain healthy sleep.”

Dream Team Baby founders Conner Herman and Kira Ryan also express support for sound machines, particularly for establishing healthy sleep routines in children:

“When we are in lighter stages of sleep, sounds around us can more easily interfere with sleep. During these sleep stages, normal external noises, such as a phone ringing, a door slamming, or a dog barking, have a higher chance of waking us up. If you have a child who has a difficult time falling asleep, the last thing you want is for him or her to be woken prematurely.”

“One way to use sound to your advantage is to play white noise the entire time your child is asleep. White noise will mask potentially troublesome external noises and help your child remain asleep longer. If used consistently, white noise also has another benefit. It can become a positive sleep cue. Your child will hear the noise at sleep time, associate it with sleep, and his or her body will involuntarily relax into sleep.”

The idea of sound machines or white noise to condition external noises is supported by science, too. One team of researchers found white noise helped reduced awakenings to common intensive care unit sounds, by smoothing the difference between baseline and peaks in noise. An older study of infants found that 80% fell asleep within five minutes in the white noise group, compared to only 25% in the control group without noise.

Controlling Sounds In Your Environment;

Sound and noise are a fact of life, and many types are simply unavoidable. However, there are a few helpful steps you can take to minimize noise pollution during rest and help your family sleep better.

If you notice that you wake up often during the night or you feel less than well-rested in the morning, consider tracking your sleep using an app like SleepBot or Smart Alarm Clock. Both of these apps and many others record any disruptions while you sleep, which can give you insight into noises that may be waking you up or disturbing your slumber.

Minimizing Inside Noises;

Use white noise to create a consistent gentle soundtrack if bumps in the night bother you. It can be particularly helpful for children whose bedtimes are generally earlier than their parents’. White noise can come from a fan, sound conditioner, white noise machine, air purifier or other soothing sound. However, be mindful of the volume especially for babies — a white noise machine shouldn’t be too loud. Experts vary, but below 50 to 65 decibels or so is considered maximum. For reference, that’s similar to or quieter than a soft shower or normal conversation. * Run dishwashers and laundry machines well before bedtime. * Consider turning ice makers off if bedrooms are near the kitchen. * Place large bookcases against walls to act as a buffer. For example, between a living room and bedroom or between a wall shared with neighboring apartments. * Turn televisions off before bedtime (or turn volume down and set a timer). * Turn loud sounds off on all smartphones and devices before bed to minimize disruptions. * If a partner’s snoring is what’s keeping you up, check out noise cancelling ear buds. Don’t forget though, excessively loud snoring or snoring that sounds like the person stops breathing can be a sign of sleep apnea, so it’s also something they should bring up with a doctor who can recommend other solutions.

Minimizing Outside Noises

* Place your bed away from outside walls when possible. * Make sure your windows and doors aren’t drafty. Seal any gaps in window frames with an appropriate insulating foam. Use door draft minimizers on either outside or indoor doors with gaps. * Double-pane windows and heavy blinds can dampen some street noise, and there are also different types of acoustic tiles and insulation that could further reduce noise levels from outdoors. * Utilize white noise the same as you would for indoor noises. * Try earplugs if you live in a very loud space. * One longer term solution is to plant trees and shrubs close together as a noise buffer. * When you’re travelling, pack earplugs or noise cancelling headphones to make sleep easier in your new environment. Ask for a quiet room away from entry ways or a corner room when you book your hotel. A travel sound machine or your smartphone can also be handy, as several phone apps also have white noise and nature sounds designed to promote sleep.