Published: 22:07 EDT, 18 October 2020 | Updated: 22:07 EDT, 18 October 2020

Whether it’s the hum of a fan or synthetic sounds from a smartphone, problem sleepers often turn to so-called ‘white noise’ for relief.

Apps which replicate white noise are hugely popular – the iPhone’s Bedtime Fan app has more three million downloads while the Android White Noise Generator has over a million.

Mathias Basner, a professor of psychiatry at the University of Pennsylvania School of Medicine in Philadelphia, told The Guardian: ‘If these apps or devices could only do good things, I wouldn’t really care. 

Problem sleepers often turn to so-called ‘white noise’ for relief but no there are doubts over potential harm

The term ‘white noise’ technically refers to a repetitive hissing at different frequencies, but it’s also used as a shorthand for calming sounds which drown out background noise.

Professor Christian Cajochen, of the Centre for Chronobiology at the University of Basel in Switzerland, said: ‘Any acoustic stimulus being continuous or not has the potential to interrupt the sleep process.’

Using a fan is the most common option, although modern apps allow an insomniac to pick calming recordings such as crashing waves or the sounds of nature.

One theory to its purported effectiveness is that it becomes a self-fulfilling prophecy: the sound of a fan helps you sleep because you turn it on at bedtime.

But Dr Basner worries the human auditory system does not switch off overnight – although this is yet to be put to the test.

‘Whenever we’re exposed to sounds and noise, the inner ear is translating that into nerve signals that are then interpreted by the brain,’ he said.

‘It is an active process, which generates metabolites, some of which have been shown to be harmful to the inner ear. 

‘You probably want to have a period where the auditory system can wind down, regenerate and prepare for the next wake period.’

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Source: https://www.dailymail.co.uk/news/article-8853881/Why-white-noise-apps-wont-help-sleep-Method-cause-harm-good-study-suggests.html

Sleep, White noise, Insomnia, Research

World news – GB – Why white noise apps won’t help you to sleep, new study suggests

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