"Rain is predictable, calming, stable, and non-threatening,

Описание: This sound is almost universally adored, but why? According to researchers, we love rain and other water noises because we perceive them as non-threatening. Sudden sounds jolt us out of our reverie, triggering an evolutionary response known as the threat-activated vigilance system.
Rain sounds is a rhythmic ticking sound, which sounds like a wonderful lullaby that can help people fall asleep quickly. Studies have found that when rain sounds enter people's brains, the brain unconsciously relaxes and produces alpha waves, which are very close to the state of the brain when a human sleeps.
our brains interpret the noises we hear — both while awake and in the dead of night — as either threats or non-threats.
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Certain sounds, such as screams and loud alarm clocks, can hardly be ignored. Yet other sounds, like the wind in the trees and waves lapping ashore, we sort of tune out
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"These slow, whooshing noises are the sounds of non-threats, which is why they work to calm people," said Orfeu Buxton, an associate professor of biobehavioral health at Pennsylvania State University. "It's like they're saying: 'Don't worry, don't worry, don't worry.'"
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Louder noises in general, as we've all experienced, tend to be harder to sleep through. But perhaps even more important than volume is the character of a sound in how it can trigger the brain's so-called threat-activated vigilance system and jolt us from slumber.

"The type of noise defines if you will wake up or not, controlling for the volume because the noise information is processed by our brain differently," Buxton said.

For instance, although the sounds of crashing waves can vary considerably in volume, with quiet intervals followed by crescendos, the waves' hubbub smoothly rises and falls in intensity.

That's in stark contrast to a scream or a ringing phone suddenly piercing a silence, reaching peak loudness almost instantly.
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"Wake up!"

This key acoustic distinction between abrupt threat and gradual non-threat was borne out in a 2012 study by Buxton in a hospital setting. Even at low volumes of around 40 decibels — a whisper, essentially — alarms from hospital equipment aroused study participants from shallow sleep 90 percent of the time and half the time from a deep sleep.

Meanwhile, the sounds of a helicopter and traffic, when reaching the level of a shout at 70 decibels, still did not wake participants as frequently as alarms, ringing phones, and even relatively quiet human conversations, which again can feature that jarring, no-noise-to-peak-noise delivery. [Top 10 Spooky Sleep Disorders]


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Acoustic camouflage

Another reason watery sounds can help us sleep? Non-threatening noises, especially when relatively loud, can drown out those sounds that might otherwise raise red flags in the brain's threat-activated vigilance system.

"Having a masking form of noise can also help block other sounds you don't have control over, whether someone is flushing a toilet in another part of the house, or there are taxis or traffic outside — whatever the acoustic insult is," Buxton said.

All of which makes it understandable that water-themed sleep aids have proved so popular over the decades, across media ranging from cassettes to compact disks to MP3s to the mobile device apps of today.
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"Anything pertaining to water sends me to a place of nostalgia and comfort," says Canadian writer Hannah Johnson, who grew up listening to her grandmother's whale sounds cassette tape and spending summers at the beach in Nova Scotia. In a lockdown, when Johnson began experiencing more bouts of insomnia than usual, she started listening to water-centric nature sounds to help clear her mind and quell her longing for a getaway. Among her top tracks were "Heavy Thunderstorm Sounds" and "Soothing Rain Sounds in Glastonbury" by Stardust Vibes, a mother-son duo that produces nature sound recordings and relaxation music. "Sometimes I’ll put on a crackling fireplace soundtrack, or a particularly beachy rainstorm track that makes me feel like maybe there isn’t a pandemic raging and I’m on a weekend getaway at a secluded cottage somewhere," she explains. While V Magazine's digital director Mathias Rosenzweig finds similar comfort in nature sounds, not just any rain soundscape will do. "I have, quite literally, spent hours trying to find the perfect rain soundtrack," Rosenzweig tells me. "It needs to be the right pitch, the right 'volume' of rain, and consistent, without sudden bursts of lightning and whatnot to ruin the vibe or give me a heart attack while I’m heading to dreams Ville. ASMR
" His pitch-perfect soundtrack? Crain & Taylor's “Mountain Rain,” off of an album beloved by new parents: Help Your Baby Sleep Through the Night. relaxing and satisfying video, relaxing and meditation music
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