Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Pollution due to Noise:
Sound is an important means of communication, but high levels of noise could damage hearing, and cause deterioration in capacity to concentrate on work. Noise is referred to as unwanted sound that is usually unpleasant. The loudness of noise is measured in decibels (db). The quietness of a lonely place at night may be represented by, 20 db; a library where people are not supposed even to talk loudly, by 40 db; the sound level when you hear a radio broadcast, by 60 db; a factory or a motor-cycle may produce uncomfortable noise at 100 db, if you stand near a jet engine of the airlines it may be hard to bear the noise of 120 db level. High level of noise is harmful to man. Hearing loss begins with prolonged exposure (8 hours or more) to noise at 80-90 db or more.
Can you think of some places where there is high level of noise? The level of noise is very high in certain industries, such as the ones dealing with iron and steel manufacture, motor vehicle production, metal products fabrication. printing and publishing, lumbering and wood products, and textile manufacturing. Busy streets in big towns, and the places near the railway tracks are so noisy that if you were living there, you would hardly be able to sleep.
It is often said that noise pollution is different from air, soil and water pollution. let us see how? Noise pollution differs significantly from air, soil and water pollution in the sense that it decays almost instantaneously and leaves no residues, whereas a majority of pollutants of air, soil and water remain as such for very long durations. Now the question arises how can noise pollution be reduced? Maintenance of machinery and automobiles, etc. in good condition reduces noise. Loudspeakers which blare music at night during celebrations of festivals or marriages cause tremendous strain on the whole neighbourhood. Rules that already exists to stop such noise should be enforced by local administration. Planting of trees along roads also reduces noise levels in residential areas or if work places.
Determine about the Chemical weathering Chemical weathering is accelerated by the presence of oxygen, and organic and inorganic acids resulting from the microbial breakdown of p
How do you explain the fact that clay soils which commonly have higher pore space than sandy soils are often more poorly aerated than sandy soils. Clay soils have higher pore s
what is the solution of the water polution
Explain the Ketone bodies - abnormal constituent of urine Ketone body is an intermediate breakdown product of fats in the body. It can be any of three compounds (acetoacetic a
How to become a geology tutor
Scurvy Disease occurs due to vitamin C deficiency.
Question 1 Discuss the elements of cohort study 2 Explain the steps in a Research process 3 What is probability sampling? What are the different types of probability sampling?
REQUIREMENTS Chemicals The following materials are common for the whole batch of students at the Study Centre, since this is a demonstration exercise. Acetone (or ethyl meth
Explain the Control of Salivary Secretion The autonomic control of saliva secretion occurs in two ways, as unconditioned and conditioned reflex. What are these? Let's find out.
what is the process of komodo dragon when reproducing by parthenogenesis
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd