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Essay on Noise Pollution for students and children

 




 Noise Pollution  or Sound pollution

Sound, a normal feature of our life, is the means of communication and entertainment in most animals, also in human beings. It is also a very effective alarm system. 

 A low wound is pleasant whereas a loud sound is unpleasant and is commonly known as 'noise. Noise can be defined as an unpleasant and And unwanted sound. 

 Whether a given sound is very pleasant like music and unpleasant as noise depends on its loudness, duration, rhythm and the mood of the person. But loudness is definitely the most significant criterion which changes sound into noise. 

Exposure to loud noise is indeed annoying and harmful too. Noise is a physical form of pollution which is not directly harmful to the life supporting systems namely air, soil and water. lts effects are more directly on the receiver. 

 

Noise pollution is the result of modern industrialised urban life and congestion because of Over population. Sources of Noise Pollution  

Major sources of noise pollution are as follows : )

 (I)Industrial Sources Progress in technology has resulted in creating noise pollution. XDle mills, printing presses, engineering establishments and uetal works etc., contribute heavily towards noise pollution. 

In industrial cities like Ludhiana, Kanpur, Calcutta ete., often ndustrial zones are not separated frcm the residential zones of Cty especially in the case of small scale industries. 

 

These Prate from work-shops located on the ground floors of the esidential areas and results annoyance, discomfort and irritation to e residents exposed to the noise that is inevitably produced.

 (ii) Household household is an industry in itself and is a source of many indoor nois nO1ses eg. the banging of doors, noise of playing children, g of infants, moving of furniture, loud conversation of the inhabitants etc.

 

Besides these are the entertainment equipment in the ho namely the record-players and television, radio, sets. 

(iii) Transport Vehicles Automobile revolution in urban centres has proved to be a source of noise pollution. 

Increasing traffic has given rise to traffic jams in congested areas where the repeated hooting of ho through impatient drivers pierce the ears of all road users. No from airplanes constitutes an increasing serious problem in cities like Delhi & Mumbai. 

Airport situated in the vicinity population centres and the aerolanes pass over residential areas Heavy trucks, scooters, buses trains, jet-planes, motor-cycles mopeds, jeeps -the list of vehicles is endless but the outcome is same-noise pollution.

 (iv)Defence Equipment A lot of noise pollution is added to the atmosphere by artillery, tanks, launching of rockets, exercising of military aeroplanes noise explosions and shooting practices.

 Screams of jet engines and sonic booms have a deafening effect on the ears and in extreme cases have been known to shatter the window panes and old dilapidated buildings. 

(v) Agricultural Machines Harvesters, tube wells, powered tillers, Tractors, thrashers etc. have all made agriculture highly mechanical but at the same time highly noisy. Noise level 90 dB to 98 dB due to running of farm machines have been recorded in rural areas.

 (vi) Public Address System people need only the slightest of an excuse for using loud speakers. The reason may be a religious function, elections, demonstration, birth, death, marriage, or just commercial advertising. Public system, therefore, contributes in its own way towards noise pollution. 

(vil) Miscellaneous Sources The automobile repair shops, blasting, bulldozing construction-works, stone crushing etc. are other sources of noise pollution.

Noise is generally harmful and a serious health hazard. lt has far-reaching consequences and has many physical, physiological and psychological effects on human beings,

Physical Effects The physical manifestation of noise pollution is the effect on hearing ability. Repeated exposure to noise may cause temporary or permanent shifting ot the hearing threshold of a person depending on the level and duration of exposure. 

The immediate and acute effect of noise pollution is impairment of hearing. Human ears have sensory cells for hearing. When these cells are subjected to repeated sounds of high intensity before they have an opportunity to recover fully they can become permanently damaged leading to impairment of hearing. Besides the sensory, cells, the delicate tympanic membrane or the ear drum can also be permanently damaged through a sudden loud noise such as an explosion. 

Physiological Effects The physiological manifestation of noise pollution are of various types as mentioned below ) 

(i)Muscular strain and nervous breakdown. 

(ii) Decrease in the rate of colour perception.

 (iii) Digestive spasms through anxiety and dilation of the pupil of the eye, thereby causing eye-strain. 

iv) Decrease in heart output. 

(v) Narrowing of arteries.

 (vi) Headache by dilating blood vessels of the brain. Psychological Effect  

 

Psychological disturbance.

 (1) Straining of senses and annoyance as a result of slow but persistent noise from motorcycles, alarm clocks, call bells, telephone rings etc

 (2) Depression and fatigue which considerably reduces the efficiency of a person.

For a talkative person, the most important effect of noise pollution would invariably be that noise interferes with our conservation thus noise is annoying and the annoyance depends on many not merely the intensity of the sound but also repetition because even a sound of small  intensity may become annoying, simply by repetition.

Read more about types of pollution  

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