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Essay on Noise Pollution for Children and Students
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Essay on Noise Pollution: Sources, Effects and Prevention
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Long and Short Essay on Noise Pollution in English
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Physical damage to the ear and the temporary hearing loss often called a temporary threshold shift TTS. People suffering from this condition will be unable to detect weak sounds. However, hearing ability is usually recovered within a month of exposure. Below a sound level of 80 dB. However temporary effects are noticed at sound levels between 80 and dB. About 50 percent of the people exposed to 95 dB sound levels at work will develop NIPTS and most people exposed to more than dB will experience permanent hearing loss.
In additions to hearing losses, excessive sound levels can cause harmful effect on the circulatory system by raising blood pressure and altering pulse rates. Make sure that all openings are acoustically sealed. Noise, lake water rushes out through any cracks or openings. Muffling vehicles and machinery to reduce the noise. In industries, different types of absorptive material can be used to control interior noise. Noise reduction can be done by using rigid sealed enclosures around machinery lined with acoustic absorbing material.
Isolating machines and their enclosures from the floor using special spring mounts or absorbent mounts and pads and using flexible couplings for interior pipelines also contribute to reducing noise pollution at the source.
Regular and thorough maintenance of operating machinery. We should reduce mechanical run out of shafts.
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By reducing this source of vibration excitation many components like bearing gears and cans may generate less noise and have generate life. We must improve lubrications. We should install bearings correctly. Improper installation sometimes is the reason for bearing noise problems. Traffic volume and speed also have significant effects on the overall sound. Example: doubling the speed increases the sound levels by about 9 dB and doubling the traffic volume number of vehicles per hour increases sound levels by about 3 dB. A smooth flow of traffic causes less noise than a stop-and-go traffic pattern.
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Thus proper highway planning and design are essential for controlling traffic noise. Establishing lower speed limits for highways that pass through residential areas, limiting traffic volume and providing alternative routes for truck traffic are effective noise control measures.