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What are the devices used to prevent noise pollution?
There are a great many devices in the world that are used to prevent noise pollution. Mutes and sound-proofing materials on walls are two devices used.
2 causes of noise pollution?
A study was carried out to determine levels and factors that influence noise pollution from small-scale industries (SSIs) in Dar es Salaam City Tanzania. Two sites for wood- and metalworks industries were investigated. Both sites exhibited equivalent noise levels higher than 90.0 dBA, the permissible exposure level limit for occupational noise. At a woodworks SSI, noise levels were found to correlate well with machine-use age, wood-feed speed, and wood-cut depth. Additionally, noise emanating from both types of SSIs was found to influence the level of environmental noise in the neighborhood of the SSIs. One woodworks SSI was found to have a circle of influence of about 140 m. The study concluded that SSIs present a serious source of environmental noise pollution in their neighborhoods. Noise pollution from SSIs is greatly influenced by the type of SSIs and the activities they carry out, the type and age of machines they use, their location relative to residential areas in their vicinity, and in-house noise control measures. Small-scale industries (SSIs) - Noise pollution - Noise-induced hearing loss
Two important causes of chemical weathering?
acid rain, pollution
What are two things you can reduce?
pollution and Global Warming
What are the two main causes of vibration?
noise and frequency are made a vibration
When does noise pollution occur?
Noise pollution requires two thing: a source of unpleasant, overly loud or unwanted noise and a person to be bothered by the noise. The criteria for the noise levels and sources are often set out in municipal or other guidelines which specify decibel levels and times of permissible noise. The "bother" caused by the noise is much more difficult to quantify and legal measures usually fall back on terms such as "loss of enjoyment of property"These two criteria are most often met in urban settings (cities, towns, etc.) The sources can be traffic, industrial processes, music or construction.Noise pollution can also occur in places where silence is seen as an aesthetic consideration. This would include areas such as nature preserves, meditative centres, and other places people go to "enjoy peace and quiet". The decibel level of noise pollution in such areas can be much lower.
What are the two main causes that have caused planet Earth to be sick?
Air pollution and Water pollution Global warming is one of the main causes to make the Earth sick too.
What is causes of the decreasing fish population in the California delta?
I think that some of the main causes of the decrease in fish populations are based mostly on two things. The first one is pollution, and the second is over fishing by fish companies however there are things being done to solve this problem.
What is two things set air in motion?
they are air and pollution
What are two causes of air pollution in the UK?
Over population, industry, littler, car emissions.... just to name a few in general reasons of pollution
What are two things that solve pollution?
Clean Air ActChange to Renewable Energy.
What two things does water conservation involve protecting against?
pollution and waste
