Scientists from Imperial College London and other European institutions monitored 140 sleeping volunteers in their homes near London Heathrow and three other major European airports.
The researchers measured the volunteers’ blood pressure remotely at 15-minute intervals and then analysed how this related to the noise recorded in the volunteers’ bedrooms.
People with high blood pressure (hypertension) have an increased risk of developing heart disease, stroke, kidney disease and dementia. High blood pressure is defined by World Health Organisation as being 140/90mmHg or more.
The researchers found that volunteers’ blood pressure increased noticeably after they experienced a ‘noise event’ – a noise louder than 35 decibels – such as aircraft travelling overhead, traffic passing outside, or a partner snoring. This effect could be seen even if the volunteer remained asleep and so was not consciously disturbed.
Aircraft noise events caused an average increase in systolic blood pressure of 6.2 mmHg and an average increase in diastolic blood pressure of 7.4 mmHg. Similar increases in blood pressure were seen also for other noise sources such as road traffic.
The researchers found that the increase in blood pressure was related to the loudness of the noise, so that a greater increase in blood pressure could be seen where the noise level was higher. For example, for every 5dB increase in aircraft noise at its loudest point, there was an increase of 0.66 mmHg in systolic blood pressure.
The decibel level - and not the origin of the sound - was the key factor in determining the effect that each noise event had on the volunteers’ blood pressure, with similar effects regardless of the type of noise, where the ‘loudness’ of the noise was the same.
The research follows recent findings by the same researchers, showing that people who have been living for at least five years near an international airport, under a flight path, have a greater risk of developing high blood pressure than a population living in quieter areas. That study, published in the journal Environmental Health Perspectives, showed that an increase in night-time aeroplane noise of 10dB increased the risk of high blood pressure by 14 per cent in both men and women.
Dr Lars Jarup, one of the authors of the study from the Department of Epidemiology and Public Health at Imperial College London, said: “We know that noise from air traffic can be a source of irritation, but our research shows that it can also be damaging for people’s health, which is particularly significant in light of plans to expand international airports. Our studies show that night-time aircraft noise can affect your blood pressure instantly and increase the risk of hypertension.
It is clear to me that measures need to be taken to reduce noise levels from aircraft, in particular during night-time, in order to protect the health of people living near airports.”
The researchers are continuing their analyses to find out whether combined exposure to noise and air pollution increases the risk of heart disease.
Laura Gallagher | alfa
Rutgers-led innovation could spur faster, cheaper, nano-based manufacturing
14.02.2018 | Rutgers University
New study from the University of Halle: How climate change alters plant growth
12.01.2018 | Martin-Luther-Universität Halle-Wittenberg
Satellites in near-Earth orbit are at risk due to the steady increase in space debris. But their mission in the areas of telecommunications, navigation or weather forecasts is essential for society. Fraunhofer FHR therefore develops radar-based systems which allow the detection, tracking and cataloging of even the smallest particles of debris. Satellite operators who have access to our data are in a better position to plan evasive maneuvers and prevent destructive collisions. From April, 25-29 2018, Fraunhofer FHR and its partners will exhibit the complementary radar systems TIRA and GESTRA as well as the latest radar techniques for space observation across three stands at the ILA Berlin.
The "traffic situation" in space is very tense: the Earth is currently being orbited not only by countless satellites but also by a large volume of space...
An international team of researchers has discovered a new anti-cancer protein. The protein, called LHPP, prevents the uncontrolled proliferation of cancer cells in the liver. The researchers led by Prof. Michael N. Hall from the Biozentrum, University of Basel, report in “Nature” that LHPP can also serve as a biomarker for the diagnosis and prognosis of liver cancer.
The incidence of liver cancer, also known as hepatocellular carcinoma, is steadily increasing. In the last twenty years, the number of cases has almost doubled...
In just a few weeks from now, the Chinese space station Tiangong-1 will re-enter the Earth's atmosphere where it will to a large extent burn up. It is possible that some debris will reach the Earth's surface. Tiangong-1 is orbiting the Earth uncontrolled at a speed of approx. 29,000 km/h.Currently the prognosis relating to the time of impact currently lies within a window of several days. The scientists at Fraunhofer FHR have already been monitoring Tiangong-1 for a number of weeks with their TIRA system, one of the most powerful space observation radars in the world, with a view to supporting the German Space Situational Awareness Center and the ESA with their re-entry forecasts.
Following the loss of radio contact with Tiangong-1 in 2016 and due to the low orbital height, it is now inevitable that the Chinese space station will...
Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, provider of research and development services for OLED lighting solutions, announces the founding of the “OLED Licht Forum” and presents latest OLED design and lighting solutions during light+building, from March 18th – 23rd, 2018 in Frankfurt a.M./Germany, at booth no. F91 in Hall 4.0.
They are united in their passion for OLED (organic light emitting diodes) lighting with all of its unique facets and application possibilities. Thus experts in...
A new scenario seeking to explain how Mars' putative oceans came and went over the last 4 billion years implies that the oceans formed several hundred million...
23.03.2018 | Event News
19.03.2018 | Event News
16.03.2018 | Event News
23.03.2018 | Materials Sciences
23.03.2018 | Agricultural and Forestry Science
23.03.2018 | Physics and Astronomy