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Could living near a wind farm make you deaf? 

Credit:  Could living near a wind farm make you DEAF? Low frequency 'hum' could damage the inner ear, experts warn | By Sarah Griffiths for MailOnline | 1 October 2014 | www.dailymail.co.uk ~~

Wind farms could cause people living nearby to go deaf, a new study claims.

The barely audible low frequency hum emitted by turbines harms ‘the exquisite mechanics of our inner ears’, scientists say.

A study of 21 healthy young men and women who were exposed to such sound, revealed that most experienced changes in cells in the cochlear – a spiral shaped cavity essential for hearing and balance.

Researchers measured the changes by analysing Spontaneous Otoacoustic Emissions (SOAEs), which are the faint sounds produced in the ear that can detect changes to its physiology.

Dr Marcus Drexel, of the University of Munich, said man-made sources of low frequency noise have spread dramatically in recent years and are also generated by thermal power stations, ventilation and air conditioning systems.

‘The dogma of “what you can’t hear, won’t hurt you” is deeply rooted in society and governs the current health and safety regulations,’ he said.

‘However, while even loud low frequency sounds are not perceived as obtrusive, our findings show such sounds affect the exquisite mechanics of our inner ears in a significant manner.

‘Our study identifies a mechanism in our hearing system, which can contribute to explain conditions associated with low-frequency sound emissions.’

In the study, the participants were exposed to a low frequency wavelength of 30Hz for 90 seconds, to mimic the noise generated a wind turbine.

The noise was well below health and safety regulations, according to the paper, which was published in the journal Royal Society Open Science.

Humans can have a hearing range of between 20 and 20,000Hz.

Dr Drexel said: ‘Most interestingly, 17 of the 21 subjects revealed an overall of 56 new SOAEs, which had not been measurable before low frequency stimulation.’

For decades, experts thought that sound lower than 250Hz largely bypassed the inner ear even at intense levels, because thresholds are relatively high. But this could be incorrect.

Dr Drexel said: ‘The current data show in humans, active cochlear mechanics, as assessed by SOAE measurements, are significantly affected by low frequency stimulation.

‘To the best of our knowledge, this is the first comprehensive study focusing on the effect of low frequency sound on level and frequency of human SOAEs.’

Wind farms have also been linked with a greater risk of heart disease, panic attacks and migraines.

The farms are said to cause ‘wind turbine syndrome’, the symptoms of which include tinnitus, vertigo and sleep deprivation.

It is thought that thousands of people are super sensitive to low frequency sounds which are produced by factory machinery and transport as well as household items such as fridges and boilers.

In extreme cases, ‘the hum’ can result in headaches, depression and even, in one instance, suicide.

It is estimated that up to 30 per cent of the population suffer from some sort of noise sensitivity and at least 10,000 people now hear ‘the hum’.

The wind industry has been accused of ignoring the damaging impact of the intermittent noise from turbines for 25 years.

A 1987 research paper for the US Department of Energy showed the ‘annoyance’ caused by them to nearby residents was ‘real not imaginary’.

Source:  Could living near a wind farm make you DEAF? Low frequency 'hum' could damage the inner ear, experts warn | By Sarah Griffiths for MailOnline | 1 October 2014 | www.dailymail.co.uk

This article is the work of the source indicated. Any opinions expressed in it are not necessarily those of National Wind Watch.

The copyright of this article resides with the author or publisher indicated. As part of its noncommercial educational effort to present the environmental, social, scientific, and economic issues of large-scale wind power development to a global audience seeking such information, National Wind Watch endeavors to observe “fair use” as provided for in section 107 of U.S. Copyright Law and similar “fair dealing” provisions of the copyright laws of other nations. Send requests to excerpt, general inquiries, and comments via e-mail.

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