تكفون بليز ساعدوني

تكفون ساعدوني معقوله ولا وحده عندها لغه ......................

I'm sorry my dear
!! but I didn't understand the whole topic
.

هلا اختي تفضلي هذه الاسئلة والاجوبة عن تلوث الضوضاء
what are the Sources of noise
The overarching cause of most noise worldwide is generated by transportation systems, principally motor vehicle noise, but also including aircraft noise and rail noise. Hybrid vehicles for road use are the first widely sold automobiles in 100 years to achieve significant noise source reduction. Poor urban planning may also give rise to noise pollution, since juxtaposition of industrial to residential land uses, for example, often results in adverse consequences for the residential acoustic environment.
Besides transportation noise, other prominent sources are office equipment, factory machinery, appliances, power tools, lighting hum and audio entertainment systems. With the popularity of digital audio player devices, individuals in a noisy area might increase the volume in order to drown out ambient sounds. Construction equipment also produces noise pollution.
do there any bad effects on Human health
Principal noise health effects are both health and behavioral in nature.. The following discussion refers to sound levels that are present within 30 to 150 meters from a moderately busy highway.
Hearing
[/IM
The mechanism for chronic exposure to noise leading to hearing loss is well established. The elevated sound levels cause trauma to the cochlear structure in the inner ear, which gives rise to irreversible hearing loss. 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. In Rosen's seminal work on serious health effects regarding hearing loss and coronary artery disease, one of his findings derived from tracking Maaban tribesmen, who were insignificantly exposed to transportation or industrial noise. This population was systematically compared by cohort group to a typical U.S. population. The findings proved that aging is an almost insignificant cause of hearing loss, which instead is associated with chronic exposure to moderately high levels of environmental noise.
what harmful imprints that niose pollution leave on Environment
Noise pollution can also be harmful to animals. High noise levels may interfere with the natural cycles of animals, including feeding behavior, breeding rituals and migration paths. The most significant impact of noise to animal life is the systematic reduction of usable habitat, which in the case of endangered species may be an important part of the path to extinction. Perhaps the most sensational damage caused by noise pollution is the death of certain species of beaked whales, brought on by the extremely loud (up to 200 decibels) sound of military sonar
.
What YOU Can Do
Turn down the volume. Turning down the volume on audio equipment, especially the ones placed directly on the ear, lowers the energy received by the eardrum and also on the tiny hairs in the cochlea.
Avoid loud noise situations. Either avoid loud noise situations altogether, or place barriers between you and the noise source. The thicker and heavier the barrier, the more the sound will be reduced.
Wear ear protectors. Ear plugs placed inside the ear, or ear muffs on the outside, can keep a lot of the noise from entering the ear. Tightly fitting hearing protection can reduce the sound level we hear by 25db. A good “rule of thumb” is that you should wear hearing protection if someone less than two feet away from you has to raise his or her voice for you to hear them. They should definitely be worn when using loud equipment or when attending loud concerts.
Keep at a distance. If you move twice as far away from a noise source, the sound level is decreased by four times. The further you move away, the lower the noise level.
Repair equipment. Repairing broken mufflers on cars, and making sure loud squeaking belts on machines are fixed, are other methods of limiting noise pollution.
Not all sounds are dangerous, and it is almost impossible to eliminate every source of noise pollution. However, reducing exposure to noise can help keep your hearing in the best possible condition.
موفقة