Topic
Noise pollution
About: Noise pollution is a research topic. Over the lifetime, 4455 publications have been published within this topic receiving 67192 citations.
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TL;DR: This study shows that combined exposure to mixed organic solvents and occupational noise can exacerbate hearing loss in workers, and an appropriate hearing protection programme is recommended, that would include short-interval audiometric examinations and efficient hearing protectors.
Abstract: Exposure of workers to mixtures of organic solvents and to occupational noise is frequent in a number of industries. Recent studies suggest that exposure to both can cause a more severe hearing loss than exposure to noise alone. Our cross-sectional study included 411 workers of a large automobile plant divided in three groups. The first group included assembly workers exposed to noise alone; the second included workers in a new paint shop, who were exposed to a mixture of organic solvents at a permissible level; and the third group included paint shop workers exposed to both noise and higher than permissible levels of organic solvents in an old paint shop. These groups were compared in terms of low-frequency hearing loss (model 1; average hearing threshold >25 dB at 0.5 kHz, 1 kHz, and 2 kHz) and high-frequency hearing loss (model 2; average hearing threshold >25 dB at 3 kHz, 4 kHz, 6 kHz, and 8 kHz). High-frequency hearing loss was more common in workers exposed to a combination of noise and mixed organic solvents even at permissible levels than in workers exposed to noise alone even after correction for confounding variables. This study shows that combined exposure to mixed organic solvents and occupational noise can exacerbate hearing loss in workers. Therefore, an appropriate hearing protection programme is recommended, that would include short-interval audiometric examinations and efficient hearing protectors.
25 citations
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15 Jul 2013TL;DR: In this paper, the authors focus on predicting the noise certification benefits of a notional open rotor aircraft with tail structures shielding a portion of the rotor noise, and the measured noise of an open rotor test article is used to validate NASA s reliance on acoustic shielding to achieve the second phase of community noise reduction goals.
Abstract: NASA sets aggressive, strategic, civil aircraft performance and environmental goals and develops ambitious technology roadmaps to guide its research efforts. NASA has adopted a phased approach for community noise reduction of civil aircraft. While the goal of the near-term first phase focuses primarily on source noise reduction, the goal of the second phase relies heavily on presumed architecture changes of future aircraft. The departure from conventional airplane configurations to designs that incorporate some type of propulsion noise shielding is anticipated to provide an additional 10 cumulative EPNdB of noise reduction. One candidate propulsion system for these advanced aircraft is the open rotor engine. In some planned applications, twin open rotor propulsors are located on the aft fuselage, with the vehicle s empennage shielding some of their acoustic signature from observers on the ground. This study focuses on predicting the noise certification benefits of a notional open rotor aircraft with tail structures shielding a portion of the rotor noise. The measured noise of an open rotor test article--collected with and without an acoustic barrier wall--is the basis of the prediction. The results are used to help validate NASA s reliance on acoustic shielding to achieve the second phase of its community noise reduction goals. The noise measurements are also compared to a popular empirical diffraction correlation often used at NASA to predict acoustic shielding.
25 citations
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Pompeu Fabra University1, University of Barcelona2, Imperial College London3, University of Basel4, Swiss Tropical and Public Health Institute5, McGill University6, McGill University Health Centre7, Cancer Epidemiology Unit8, Norwegian University of Science and Technology9, National Institutes of Health10, University of Bristol11, Imperial College Healthcare12, University Medical Center Groningen13
TL;DR: The study suggests that road traffic noise may be related to increased heart rate, and no consistent evidence for a relation between noise and blood pressure was found.
25 citations
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TL;DR: In this paper, the authors examined the noise emitted by a full scale operating Wave Energy Converter (WEC) in the Lysekil project at Uppsala University in Sweden and showed that several marine organisms (fish and mammals) will be able to hear the operating WECs of a distance of at least 20 m.
Abstract: Wave energy conversion is a clean electric power production technology. During operation there are no emissions in the form of harmful gases. However there are unsolved issues considering environmental impacts such as: electromagnetism; the artificial reef effect and underwater noise. Anthropogenic noise is increasing in the oceans worldwide and wave power will contribute to this sound pollution in the oceans; but to what extent? The main purpose of this study was to examine the noise emitted by a full scale operating Wave Energy Converter (WEC) in the Lysekil project at Uppsala University in Sweden. A minor review of the hearing capabilities of fish and marine mammals is presented to aid in the conclusions of impact from anthropogenic sound. A hydrophone was deployed to the seabed in the Lysekil research site park at distance of 20 and 40 m away from two operational WECs. The measurements were performed in the spring of 2011. The results showed that the main noise was a transient noise with most of its energy in frequencies below 1 kHz. These results indicate that several marine organisms (fish and mammals) will be able to hear the operating WECs of a distance of at least 20 m.
25 citations
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TL;DR: Among environmental factors contributing to disease in Europe, environmental noise leads to a disease burden that is only second in magnitude to that from air pollution, a new World Health Organization report finds.
Abstract: Traffic related noise accounts for over one million healthy years of life lost annually to ill health, disability, or early death in western Europe, according to a new World Health Organization report.
The study finds that among environmental factors contributing to disease in Europe, environmental noise leads to a disease burden that is only second in magnitude to that from air pollution. Noise pollution causes or contributes to not only annoyance and sleep disturbance but also heart attacks, learning disabilities, and tinnitus.
The report concludes that there is sufficient evidence from large scale epidemiological studies …
25 citations