Filed under: Uncategorized | Tags: monkey, noise, noise pollution, science
Results of the research conducted by Ye Wang, Department of Neurobiology and Anatomy, University of Texas-Houston Medical School and Simona Celebrini, Yves Trotter, and Pascal Barone, Centre de Recherche Cerveau & Cognition, Faculté de Médecine de Rangueil, Toulouse, France was recently published in BMC Neuroscience as Visuo-auditory interactions in the primary visual cortex of the behaving monkey. Electrophysiological evidence shows evidence of multisensory interactions that occur to quickly in monkeys to be explained by traditional models of neurological sensory processing.
Traditional neurological models of auditory, tactile and visual sensory input processing by the brain are hierarchal, based on separate input channels from sensory receptors for each mode to each of the primary sensory cortices and that the various inputs are not integrated into polymodality until the signal reaches higher areas of cognitive activity such as the frontal, temporal and parietal lobes. More recently, imaging and EEG studies of humans have shown cross-modal activity directly linking areas of the brain that are involved in processing different sensory modalities leading to a reevaluation of the traditional view of isolated sensory processing until sensory signals reach areas of higher brain function.
The most recent study involved using monkeys trained to locate a spot of light projected on a video screen. The experiment involved comparing results using visual only (V) stimuli with those of visual stimuli coupled with audio stimuli (A/V). While monitoring 45 to 50 individual neurons for electrophysiological response strength and latency in the monkey’s primary visual cortex (V1), the study found that the monkeys could quickly locate a visual stimulus under conditions of high contrast but took longer when the contrast was decreased. When the low contrast spot was coupled with an auditory stimulus, the monkeys showed a significant increase in mean response latency, but showed no improvement in response from A/V input when with high contrast visual input.
Filed under: Industrial pollution control | Tags: air sampling, audiometry, heart disease, industrial pollution, noise pollution, pollution control
New data has provided a link indicating that the earlier deaths because of the noise. So far as noise pollution that most people do not know that it is detrimental to their health. Thousands of people worldwide untimely death from heart disease as a result of long-term exposure to excessive noise studies conducted by the World Health Organization (WHO). World Body ‘ s working group on noise, environmental burden of disease started to work on the health effects of noise in Europe in 2003.
In addition to link heart disease, he concluded that two percent of Europeans suffer greatly disturb sleep due to noise, pollution and fifteen per cent suffered serious inconvenience. Chronic effects of traffic noise load causes tinnitus three per cent of cases in which people constantly hear noise in the ears.
Studies in recent years have shown that noise can increase the level of stress hormones such as cortisol, adrenaline and noradrenaline in the body, even during sleep. More of these hormones stay in circulation around the flow of blood, the more likely they are the cause life-threatening physiological problems.
High levels of stress can lead to heart failure strokes, high blood pressure and immune problems. WHO came to its figures by comparing households with abnormally high exposure to noise quieter so in homes.
In accordance with WHO guidelines, noise, the threshold for cardiovascular problems is during the night of chronic exposure to the fifty-dB (50 dB) or higher-light traffic noise. Violation of sleep, the threshold of forty-two dB (42 dB), for general annoyance he thirty-five dB (35 dB), whispering sound.
In our midst obtain busier and noisier, noise pollution may be stress, and it can cause a heart attack in people with heart disease.
Source: http://EzineArticles.com/?expert=Arnold_Cafe
Industries are constantly taking stringent measures to check noise level under control with Health and Safety equipments including light, air sampling, vibration and sound meters, hearing protection, gas monitoring and protection equipments.
Filed under: Sound Level Measurement | Tags: pollution, sound level meters, sound level monitoring
Because of the industrialization of our society had to deal with severe environmental dilemma is called noise pollution. Noise pollution poses a threat to our health, as this leads to stress. And as we all know, repetitive stress can cause serious illness.
Fortunately, you must not sit idly and wait for noise only damage your hearing – you can actually make a decision. There are many precautions you can take to avoid exposure to noise pollution, and one of them is the use of white noise.
White noise is considered an effective noise cancellation component. It limits the unwanted noise, so that you, we can work more productively. You can buy white noise machines, which are widespread in the market. These machines to control all perceptible frequency sound, and then play white noise very similar to that hide them. Remember that white noise is actually not noise. Instead, it uses sound to mask the noise. It blankets all other sounds, with its devastating effects neutralization.
white noise machines are very useful in helping you to get some sleep or help you set a disturbing sounds of your surroundings. It also may prove useful if you live or work near a busy street or in a place with noisy neighbors. It can also hide the conversation, if you do not want to be overheard people in the next issue. If you have babies in the house, white noise machines blessing – it can help improve your child’s quality of sleep.
Mental and physical benefits of white noise include better sleep, stress reduction, increased ability to focus, and greater sense of well-being, among many others. White noise machines slightly more expensive. A successful will cost about $ 120 or more, and peripheral devices such as battery packages can coat even $ 12 or so. But if you care enough about their health, this is certainly a wise investment.
Source: http://EzineArticles.com/?expert=Eddie_Tobey
Many industries are taking steps to keep sound or noise pollution under control. For keeping noise pollution under control, adequate sound level monitoring is required.
