Shopping on line can be easy, simple and save you lots of money. It can also take a lot of your time, frustrate you, and result in unwanted purchases. Now the same can be said for regular high street shopping, but with the vast opportunity presented by the Internet it will pay you to spend a few minutes reading this and understanding how to better optimize your Noise Health Effects shopping experience:

1. Compare - without doubt the biggest advantage that the Noise Health Effects offers shoppers today is the ability to compare thousands of Noise Health Effects at a time. This is a great thing, but not necessarily all the time! Too much can be daunting at times so take advantage of the great comparison sites and where possible let them do the hard work for you.

2. Research - if it has been said it will be on the internet. Ignorance is no longer a justifiable reason for buying the wrong thing. Take the time to research in detail everything that you could possible want to know about

3. Testimonials - don't know anybody that has bought a Noise Health Effects? Wrong! If the Noise Health Effects is good the internet will let you know. Use the Internet as a friend and get testimonials before you buy.

4. Questions - Got a question about Noise Health Effects then search the Forums, FAQ's, Blogs etc. Don't be afraid to ask .....

5. Reputation - Never heard of the company selling Noise Health Effects? Don't worry, no reason why you should know every company in the world, but you know someone that does! Use the internet to find out what people are saying about Noise Health Effects and build up a picture of their reputation for sales, returns, customer service, delivery etc.

6. Returns - still worried that even after all of the above your Noise Health Effects wont be what you want? Check out the returns policy. There is so much competition now that someone, somewhere is bound to offer the terms that you are comfortable with.

7. Feedback - happy with your Noise Health Effects then let people know, after all you are depending on others people input in your buying decision, so why not give a little back.

8. Security - check for the yellow padlock on the Noise Health Effects site before you buy, and the s after http:/ /i.e. https:// = a secure site

9. Contact - got a question about Noise Health Effects, or want to leave a comment then check out the sites contact page. Reputable companies have them and respond.

10. Payment - ready to pay for your Noise Health Effects, then use your credit card or PayPal! Be aware of companies that don't accept them, there may be genuine reasons but given the huge amount of choice you have when buying online there is no reason at all not to buy via credit card or PayPal.



Noise health effects, the collection of health consequences of elevated sound levels, constitute one of the most widespread public health threats in industrialisation countries. Roadway noise is the main source of environmental noise exposure. Aerodynamic noise created at freeway speeds is particularly intense. Current conditions expose tens of millions of people to sound levels capable of causing hearing loss,Senate Public Works Committee, Noise Pollution and Abatement Act of 1972, S. Rep. No. 1160, 92nd Cong. 2nd session but also are known to induce tinnitus, hypertension, vasoconstriction and other cardiovascular impacts.http://ist-socrates.berkeley.edu/~lohp/graphics/pdf/hw24en08.pdf Beyond these effects, elevated noise levels can create stress, increase workplace accident rates, and stimulate aggression and other anti-social behaviors.Karl D. Kryter, The Handbook of Hearing and the Effects of Noise : Physiology, Psychology and Public Health,Academic Press, Nov 18, 1994 ISBN 0-12-427455-2 The most important sources of sound levels that create the above effects are motor vehicle and aircraft noise, with industrial worker noise exposure also being notable. Prolonged exposure to loud music and other media is another important source of potentially harmful noise levels.

Hearing loss , functions to collect and amplify sound.The pinna (visible portion of the human ear) combined with the middle ear amplifies sound levels by a factor of 20 when sound reaches the inner ear.Approximately ten percent of the population in industrialized societies have significant hearing loss, and millions more are steadily progressing to that outcome. The major source of hearing loss is exposure to elevated sound levels. Once it was thought that only extremely high sound levels create hearing loss; however, more careful investigations showed that cumulative exposure to relatively moderate levels, such as 70 Decibel#Relative measurements,Rosenhall, Ulf; Pedersen, Kai; Svanborg, Alvar Presbycusis and Noise-Induced Hearing Loss, Ear & Hearing, 11(4):257-263, August 1990 can lead to the irreversible loss of hearing. Another myth of noise effects is the overstated role of presbycusis, or loss of hearing associated with aging. It has been demonstrated that the most important factor of hearing degradation is not aging alone, but rather the cumulative long-term exposure to environmental and occupational noise that create the harm.Rosenhall, Ulf; Pedersen, Kai; Svanborg, Alvar Presbycusis and Noise-Induced Hearing Loss, Ear & Hearing, 11(4):257-263, August 1990 In the Rosenhall study, cohort study populations were tracked, with the result that noise-exposed persons had much greater hearing loss than their Cohort study who were relatively unexposed to noise. In fact, it has been shown that people in non-industrialized countries do not experience the same progressive hearing loss.S. Rosen and P. Olin, Hearing Loss and Coronary Heart Disease, Archives of Otollaryngology, 82:236 (1965) Due to loud music and a generally noisy environment, young people in the United States have a rate of impaired hearing 2.5 times greater than their parents and grandparents.

The mechanism of hearing loss arises from Physical trauma to stereocilia of the cochlea, the principal fluid filled structure of the inner ear. The pinna (visible portion of the ear) combined with the middle ear amplifies sound pressure levels by a factor of twenty, so that extremely high sound pressure levels arrive in the cochlea, even from moderate atmospheric sound stimulus (physiology). The cilial damage is known to be cumulative and can be irreversible.Schneider M.E., Belyantseva I.A., Azevedo R.B., Kachar B,. Rapid renewal of auditory hair bundles Nature. 22 Aug 2002. 418(6900): 837-838. The most recent research indicates that high noise levels create elevated levels of reactive oxygen species in the inner ear,Henderson, Donald; Bielefeld, Eric C.; Harris, Kelly Carney; Hu, Bo Hua, The Role of Oxidative Stress in Noise-Induced Hearing Loss, Ear & Hearing. 27(1):1-19, February 2006 which interfere with the regenerative process for cochlear cilia repair. This research shows why high noise levels have differing effects over a given population, and lead to a possible preventative strategy of adequate antioxidant intake.

In 1972 the U.S. United States Environmental Protection Agency told Congress that at least 34 million people were exposed to sound levels on a daily basis that are likely to lead to significant hearing loss.Senate Public Works Committee, Noise Pollution and Abatement Act of 1972, S. Rep. No. 1160, 92nd Cong. 2nd session Given the significant increase in traffic, car ownership and air travel since that time, the worldwide implication for industrialized countries would place this exposed population in the hundreds of millions at a conservative estimate.

Cardiovascular disease and other health effects effects can result from excessive noise pollution. Note especially the coronary artery supplying the heart itself, which structures are sensitive to narrowing and hypertension effects.

Important cardiovascular consequences follow from elevated sound levels, principally because the elevated adrenaline levels trigger a narrowing of the blood vessels (vasoconstriction). Sound levels, again of fairly typical roadway noise exposure, are known to constrict arterial blood flow and lead to hypertension; in this case, it appears that a certain fraction of the population is more susceptible to vasoconstriction. (Independently, high noise levels are known to produce Stress (medicine) reactions, another risk associated with cardiovascular disease.) Noise-induced medical stress is significant for two reasons. First, it often results from prolonged exposure for 8 to 16 hours per day, leading to elevated blood pressure for much of the day. Second, unlike emotional stress, it has a very clear effect on blood pressure, whereas this is not always true of emotional stress. These effects may be compounded by other environmental vasoconstrictors such as over-illumination or light pollution.

Other proven effects of high noise levels are increased frequency of headaches, fatigue (physical), stomach ulcers and vertigo (medical).Noise: A Health Problem United States United States Environmental Protection Agency, Office of Noise Abatement and Control, Washington, DC 20460, August, 1978 The same U.S. EPA study establishes links between high noise levels and fetal development. This body of research suggests a correlation between low-birthweight babies (using the World Health Organization definition of less than 2500 g (~5.5 lb) and high sound levels, and also correlations in abnormally high rates of birth defects, where expectant mothers are exposed to elevated sound levels, such as typical airport environs. Specific birth abnormalities included harelip, cleft palate, and defects in the Vertebral column. According to Lester W. Sontag of The Fels Research Institute (as presented in the same EPA study): “There is ample evidence that environment has a role in shaping the physique, behavior and function of animals, including man, from conception and not merely from birth. The fetus is capable of perceiving sounds and responding to them by motor activity and cardiac rate change." Noise exposure is deemed to be particularly pernicious when it occurs between 15 and 60 days after conception, when major internal Organ (anatomy) and the central nervous system are formed. Later developmental effects occur as vasoconstriction in the mother reduces blood flow and hence oxygen and nutrition to the fetus. Low birth weights and noise were also associated with lower levels of certain hormones in the mother, these hormones being thought to affect fetal growth and to be a good indicator of protein production. The difference between the hormone levels of pregnant mothers in noisy versus quiet areas increased as birth approached.

Psychological effects Earlier researchers often grouped the non-physiological impacts of noise as “annoyance”. As research unfolded, it became clear that there are a host of psychology and behavioral effects result from elevated sound levels, including: sleep disturbance, dyslexia in children, stress (medicine), mental health (including disengagement and increases in aggressive behavior). These effects are statistical but measurable changes in a population of individuals compared to a control group of persons in a quiet environment. Obviously, other negative environmental factors are likely to be present in high noise areas such as higher air pollution levels and possibly poverty-induced nutrition deficits; however, the overwhelming weight of dozens of independent studies identify noise pollution to be responsible for significant increases in the psychological effects studied above.

Measurements of noise annoyance typically rely on weighting filters, which consider sound frequencies annoying only to the degree that they are audible, on average, to a human ear at a particular decibel volume. Common methods include the older dBA weighting filter used widely in the U.S., which underestimates the impact of frequencies around 6000 Hz and at very low frequencies, and the newer ITU-R 468 noise weighting filter, which is used more widely. It is important to note that these filters do not necessarily reflect the occurrence of adverse health effects from noise, which may not depend on its audibility to the ear, nor do they take into account the propensity of low-frequency noises to penetrate into buildings or to carry over long distances.

Annoyance effects of noise vary greatly by demographics and by the perception of how useful the entity is that originates the noise. For example, aircraft mechanics who live near an airport are less likely to be complainants, since their livelihood is based upon airport operations. Annoyance is also influenced by whether the noise source is visible, whether it has pure tones or hammer effects and whether the recipient believes the noise can be controlled. In any case, the onsetH.M.E. Miedema and H. Vos, Exposure response relationships for transportation noise, Journal of the Acoustical Society of America, 105, 3336-44 of noise complaints can be as low as 40 dB(A).Stanley A Gelfand, Essentials of Audiology, Theime Medical Publishers, New York, N.Y. (2001) ISBN 1-58890-017-7 However decibels don't always tell the whole story: consider a maddening everpresent faraway radio, vs. the occasional nearby dog bark. Whether the noise occurs at night is another critical variable for annoyance phenomena. Most commonly, concerted actions of the public appear at approximately 65dBA regarding roadway, aircraft or industrial noise in the environment. Closely associated with annoyance are sleep disturbance and speech interference phenomena. The threshold for sleep interference is 45 dB(A) or lower.F Fahy and J Walker, Fundamentals of Noise and Vibration, Spon Press, UK (2001) The onset of speech interference is about 63dBA, or roughly the sound level of speech in a normal tone between two people separated by one meter.

When young children are exposed to speech interference levels of noise on a regular basis, there is a likelihood of developing speech or reading difficulties, because the auditory processing functions are compromised. In particular the writing learning impairment known as dysgraphia is commonly associated with environmental stressors in the classroom.

Effects of environmental noise upon aggression, mental health, anxiety, withdrawal and other psychological factors have been studied by numerous researchers. For example J.M. FieldJ.M. Field, Effect of personal and situational variables upon noise annoyance in residential areas, Journal of the Acoustical Society of America, 93: 2753-2763 (1993) examines a variety of these outcomes and finds significant influence of moderate-level environmental noise upon human behavior and mood. There are also strong associative impacts when other stressors are present such as over-illumination and presence of certain drugs.

Regulations Environmental noise regulations usually specify a maximum outdoor level of 60 to 65 Decibel#Relative measurements, while occupational safety organizations recommend that the maximum exposure to noise is 40 hours per week at 85 to 90 dB(A). For every additional 3 dB(A), the maximum exposure time is reduced by a factor 2, e.g. 20 hours per week at 88 dB(A). Sometimes, a factor of two per additional 5 dB(A) is used. However, these occupational regulations are acknowledged by the health literature as inadequate to protect against hearing loss and other health effects discussed above.

See also

References

External links





Noise health effects, the collection of health consequences of elevated sound levels, constitute one of the most widespread public health threats in industrialisation countries. Roadway noise is the main source of environmental noise exposure. Aerodynamic noise created at freeway speeds is particularly intense. Current conditions expose tens of millions of people to sound levels capable of causing hearing loss,Senate Public Works Committee, Noise Pollution and Abatement Act of 1972, S. Rep. No. 1160, 92nd Cong. 2nd session but also are known to induce tinnitus, hypertension, vasoconstriction and other cardiovascular impacts.http://ist-socrates.berkeley.edu/~lohp/graphics/pdf/hw24en08.pdf Beyond these effects, elevated noise levels can create stress, increase workplace accident rates, and stimulate aggression and other anti-social behaviors.Karl D. Kryter, The Handbook of Hearing and the Effects of Noise : Physiology, Psychology and Public Health,Academic Press, Nov 18, 1994 ISBN 0-12-427455-2 The most important sources of sound levels that create the above effects are motor vehicle and aircraft noise, with industrial worker noise exposure also being notable. Prolonged exposure to loud music and other media is another important source of potentially harmful noise levels.

Hearing loss , functions to collect and amplify sound.The pinna (visible portion of the human ear) combined with the middle ear amplifies sound levels by a factor of 20 when sound reaches the inner ear.Approximately ten percent of the population in industrialized societies have significant hearing loss, and millions more are steadily progressing to that outcome. The major source of hearing loss is exposure to elevated sound levels. Once it was thought that only extremely high sound levels create hearing loss; however, more careful investigations showed that cumulative exposure to relatively moderate levels, such as 70 Decibel#Relative measurements,Rosenhall, Ulf; Pedersen, Kai; Svanborg, Alvar Presbycusis and Noise-Induced Hearing Loss, Ear & Hearing, 11(4):257-263, August 1990 can lead to the irreversible loss of hearing. Another myth of noise effects is the overstated role of presbycusis, or loss of hearing associated with aging. It has been demonstrated that the most important factor of hearing degradation is not aging alone, but rather the cumulative long-term exposure to environmental and occupational noise that create the harm.Rosenhall, Ulf; Pedersen, Kai; Svanborg, Alvar Presbycusis and Noise-Induced Hearing Loss, Ear & Hearing, 11(4):257-263, August 1990 In the Rosenhall study, cohort study populations were tracked, with the result that noise-exposed persons had much greater hearing loss than their Cohort study who were relatively unexposed to noise. In fact, it has been shown that people in non-industrialized countries do not experience the same progressive hearing loss.S. Rosen and P. Olin, Hearing Loss and Coronary Heart Disease, Archives of Otollaryngology, 82:236 (1965) Due to loud music and a generally noisy environment, young people in the United States have a rate of impaired hearing 2.5 times greater than their parents and grandparents.

The mechanism of hearing loss arises from Physical trauma to stereocilia of the cochlea, the principal fluid filled structure of the inner ear. The pinna (visible portion of the ear) combined with the middle ear amplifies sound pressure levels by a factor of twenty, so that extremely high sound pressure levels arrive in the cochlea, even from moderate atmospheric sound stimulus (physiology). The cilial damage is known to be cumulative and can be irreversible.Schneider M.E., Belyantseva I.A., Azevedo R.B., Kachar B,. Rapid renewal of auditory hair bundles Nature. 22 Aug 2002. 418(6900): 837-838. The most recent research indicates that high noise levels create elevated levels of reactive oxygen species in the inner ear,Henderson, Donald; Bielefeld, Eric C.; Harris, Kelly Carney; Hu, Bo Hua, The Role of Oxidative Stress in Noise-Induced Hearing Loss, Ear & Hearing. 27(1):1-19, February 2006 which interfere with the regenerative process for cochlear cilia repair. This research shows why high noise levels have differing effects over a given population, and lead to a possible preventative strategy of adequate antioxidant intake.

In 1972 the U.S. United States Environmental Protection Agency told Congress that at least 34 million people were exposed to sound levels on a daily basis that are likely to lead to significant hearing loss.Senate Public Works Committee, Noise Pollution and Abatement Act of 1972, S. Rep. No. 1160, 92nd Cong. 2nd session Given the significant increase in traffic, car ownership and air travel since that time, the worldwide implication for industrialized countries would place this exposed population in the hundreds of millions at a conservative estimate.

Cardiovascular disease and other health effects effects can result from excessive noise pollution. Note especially the coronary artery supplying the heart itself, which structures are sensitive to narrowing and hypertension effects.

Important cardiovascular consequences follow from elevated sound levels, principally because the elevated adrenaline levels trigger a narrowing of the blood vessels (vasoconstriction). Sound levels, again of fairly typical roadway noise exposure, are known to constrict arterial blood flow and lead to hypertension; in this case, it appears that a certain fraction of the population is more susceptible to vasoconstriction. (Independently, high noise levels are known to produce Stress (medicine) reactions, another risk associated with cardiovascular disease.) Noise-induced medical stress is significant for two reasons. First, it often results from prolonged exposure for 8 to 16 hours per day, leading to elevated blood pressure for much of the day. Second, unlike emotional stress, it has a very clear effect on blood pressure, whereas this is not always true of emotional stress. These effects may be compounded by other environmental vasoconstrictors such as over-illumination or light pollution.

Other proven effects of high noise levels are increased frequency of headaches, fatigue (physical), stomach ulcers and vertigo (medical).Noise: A Health Problem United States United States Environmental Protection Agency, Office of Noise Abatement and Control, Washington, DC 20460, August, 1978 The same U.S. EPA study establishes links between high noise levels and fetal development. This body of research suggests a correlation between low-birthweight babies (using the World Health Organization definition of less than 2500 g (~5.5 lb) and high sound levels, and also correlations in abnormally high rates of birth defects, where expectant mothers are exposed to elevated sound levels, such as typical airport environs. Specific birth abnormalities included harelip, cleft palate, and defects in the Vertebral column. According to Lester W. Sontag of The Fels Research Institute (as presented in the same EPA study): “There is ample evidence that environment has a role in shaping the physique, behavior and function of animals, including man, from conception and not merely from birth. The fetus is capable of perceiving sounds and responding to them by motor activity and cardiac rate change." Noise exposure is deemed to be particularly pernicious when it occurs between 15 and 60 days after conception, when major internal Organ (anatomy) and the central nervous system are formed. Later developmental effects occur as vasoconstriction in the mother reduces blood flow and hence oxygen and nutrition to the fetus. Low birth weights and noise were also associated with lower levels of certain hormones in the mother, these hormones being thought to affect fetal growth and to be a good indicator of protein production. The difference between the hormone levels of pregnant mothers in noisy versus quiet areas increased as birth approached.

Psychological effects Earlier researchers often grouped the non-physiological impacts of noise as “annoyance”. As research unfolded, it became clear that there are a host of psychology and behavioral effects result from elevated sound levels, including: sleep disturbance, dyslexia in children, stress (medicine), mental health (including disengagement and increases in aggressive behavior). These effects are statistical but measurable changes in a population of individuals compared to a control group of persons in a quiet environment. Obviously, other negative environmental factors are likely to be present in high noise areas such as higher air pollution levels and possibly poverty-induced nutrition deficits; however, the overwhelming weight of dozens of independent studies identify noise pollution to be responsible for significant increases in the psychological effects studied above.

Measurements of noise annoyance typically rely on weighting filters, which consider sound frequencies annoying only to the degree that they are audible, on average, to a human ear at a particular decibel volume. Common methods include the older dBA weighting filter used widely in the U.S., which underestimates the impact of frequencies around 6000 Hz and at very low frequencies, and the newer ITU-R 468 noise weighting filter, which is used more widely. It is important to note that these filters do not necessarily reflect the occurrence of adverse health effects from noise, which may not depend on its audibility to the ear, nor do they take into account the propensity of low-frequency noises to penetrate into buildings or to carry over long distances.

Annoyance effects of noise vary greatly by demographics and by the perception of how useful the entity is that originates the noise. For example, aircraft mechanics who live near an airport are less likely to be complainants, since their livelihood is based upon airport operations. Annoyance is also influenced by whether the noise source is visible, whether it has pure tones or hammer effects and whether the recipient believes the noise can be controlled. In any case, the onsetH.M.E. Miedema and H. Vos, Exposure response relationships for transportation noise, Journal of the Acoustical Society of America, 105, 3336-44 of noise complaints can be as low as 40 dB(A).Stanley A Gelfand, Essentials of Audiology, Theime Medical Publishers, New York, N.Y. (2001) ISBN 1-58890-017-7 However decibels don't always tell the whole story: consider a maddening everpresent faraway radio, vs. the occasional nearby dog bark. Whether the noise occurs at night is another critical variable for annoyance phenomena. Most commonly, concerted actions of the public appear at approximately 65dBA regarding roadway, aircraft or industrial noise in the environment. Closely associated with annoyance are sleep disturbance and speech interference phenomena. The threshold for sleep interference is 45 dB(A) or lower.F Fahy and J Walker, Fundamentals of Noise and Vibration, Spon Press, UK (2001) The onset of speech interference is about 63dBA, or roughly the sound level of speech in a normal tone between two people separated by one meter.

When young children are exposed to speech interference levels of noise on a regular basis, there is a likelihood of developing speech or reading difficulties, because the auditory processing functions are compromised. In particular the writing learning impairment known as dysgraphia is commonly associated with environmental stressors in the classroom.

Effects of environmental noise upon aggression, mental health, anxiety, withdrawal and other psychological factors have been studied by numerous researchers. For example J.M. FieldJ.M. Field, Effect of personal and situational variables upon noise annoyance in residential areas, Journal of the Acoustical Society of America, 93: 2753-2763 (1993) examines a variety of these outcomes and finds significant influence of moderate-level environmental noise upon human behavior and mood. There are also strong associative impacts when other stressors are present such as over-illumination and presence of certain drugs.

Regulations Environmental noise regulations usually specify a maximum outdoor level of 60 to 65 Decibel#Relative measurements, while occupational safety organizations recommend that the maximum exposure to noise is 40 hours per week at 85 to 90 dB(A). For every additional 3 dB(A), the maximum exposure time is reduced by a factor 2, e.g. 20 hours per week at 88 dB(A). Sometimes, a factor of two per additional 5 dB(A) is used. However, these occupational regulations are acknowledged by the health literature as inadequate to protect against hearing loss and other health effects discussed above.

See also

References

External links





Noise health effects - Wikipedia, the free encyclopedia
Noise health effects are the health consequences of elevated sound levels. Elevated workplace or other noise can cause hearing impairment, hypertension, ischemic heart disease ...

2.Noise - Adverse health effects: Aural disorders/Healthy Environments
Team Leaders: Dr Meirion Evans. Mr Alan Bennett: Literature searches completed on 12 February 1998

Noise at work – health and safety in the workplace
HSE provides information on noise at work. Over 1 million employees in Great Britain are exposed to levels of noise which put their hearing at risk.

HSE - Noise: Advice for employers
The health effects of noise at work. Noise at work can cause hearing loss that can be temporary or permanent. People often experience temporary deafness after leaving a noisy place.

noise & health
... annoyance and quality of life • sleep disturbance • cardiovascular disease • children's health There is also more limited evidence of the adverse effects of noise on mental health. ...

Health Studies: Noise: Home | CDC HSB
Noise Home Page ... Chemical Terrorism Preparedness & Response ATSDR ToxFAQs; ATSDR Toxicological Profiles; EPA Chemical Response [external link]

NPC Library: Noise Effects Handbook
Office of Noise Abatement & Control, 1981) This handbook, details the effects noise has on health in areas of communication, sleep, psychologically, physiologically ...

HEALTH EFFECTS OF NOISE EXPOSURE AT WORK
z Le silence est la qualité des machines parfaites z Le silence est la qualité des machines parfaites (P. VALERY) (P. VALERY) «Silence isthequalityof perfect «Silence ...

Defra, UK - Environmental Protection - Noise and Nuisance
Department for Environment, Food & Rural Affairs Noise and Nuisance Policy ... 3.2: Potential effects of noise on health 3.3: Actual effects of noise on health

Safety and Health Topics: Noise and Hearing Conservation - Health ...
Noise and Hearing Conservation ... Although noise-induced hearing loss is one of the most common occupational illnesses, it is often ignored because there are no visible effects ...

 

Noise Health Effects



 
Copyright © 2008 Hintcenter.com - All rights reserved.
Home | Terms of Use | Privacy Policy
All Trademarks belong to their repective owners. Many aspects of this page are used under
commercial commons license from Yahoo!