Essay On Increasing Noise Pollution

Noise Pollution

When something goes beyond what is necessary, it becomes a problem. It is not bad to produce sound and it is undeniably a very important aspect of human life. However, the excessive noise that causes harm to an activity, a balance of animal and human life would be termed as noise pollution. In most cases, the source of the most noise outside is due to transportation systems, machines, aircraft, motor vehicles and trains.

Major causes of Noise Pollution

Noise pollution is normally caused by human activity. During this age of industrialization, very many companies use heavy machines that are used in production. As they roll in their movements, they normally produce a lot of sound much of which is not required. This leads to noise disturbances.

Poor urban planning has also been a major cause of noise pollution. The failure to evenly distribute land for use has led to the concentration of various causative agents of noise in one place. Proper planning would distribute the noise to other areas hence lessening the noise effect.

Man plays a lot of music during social events. In such places, many people usually gather together and the noise created may become uncontrollable leading to noise pollution. Huge tracks and vehicles traveling along the road cause some noise disturbance with the movements and hooting especially when many vehicles are in transit.

Another major cause of noise pollution is construction work. This can produce a lot of noise especially when breaking the ground or hitting against structures in a site. Additionally, household duties can also produce some noise pollution.

Noise Pollution Effects

Now that noise is a pollutant, it affects certain things and certain spheres in life. Well, noise has substantial effects on hearing. Any undesired noise coming into ears will distort them because they are formed to filter certain sounds only. Any noise that goes past that set minimum requirement ends up in damaging ears.

Noise pollution has certain effects to human health. Those experiencing it in work areas like construction sites, offices, bar including at home can lead to a major psychological complication hence affecting the total well-being of a person. Loud noises can also cause sleeping disorders that interfere with the sleeping pattern of the affected individual. It normally creates uncomfortable scenarios and irritation as well.

A noisy place makes it difficult to communicate. It can create a lot of trouble and will most likely not allow two individuals to have free communication. Indeed, noise pollution has a lot of effects on human being from the various causes as highlighted.

Essay on Noise Pollution: Sources, Effects and Control!

Noise may not seem as harmful as the contamination of air or water, but it IS a pollution problem that affects human health and can contribute to a general deterioration of environmental quality. Noise is undesirable and unwanted sound. All sound is not noise. It may be considered as music to one person and may be noise to another.

Noise is defined as ‘unwanted or offensive sound that unreasonably intrudes into our daily activities’. Sound is measured in a unit called the decibel (dB). The permitted noise level is 125 decibels as per the Environment Protection Rules 1999.

Sources of Noise Pollution:

There are numerous sources but may be broadly classified into two classes such as indoor and outdoor:

1. Outdoor:

Industries/factories, vehicular movements such as car, motor, truck, train, tempo, motor cycle, aircrafts, trains. Construction work defence equipment’s, explosions, playing of loudspeakers during various festivals etc. The higher the speed of an air craft’s the greater the noise pollution.

The invention of supersonic air craft’s has added more noise for the persons who live near aerodromes. Another source of noise pollution connected with aero planes has been scaring away of birds. Satellites are projected into space with the help of high explosive rockets also contributes to noise pollution.

2. Indoor:

Loudly played radio or music systems, and other electronic gadgets etc.

Effects of Noise Pollution:

a. Emotional or psychological effects — irritability, anxiety and stress. Lack of concentration and mental fatigue are significant health effects of noise.

b. It has been observed that the performance of school children is poor in comprehension tasks when schools are situated in busy areas of a city and suffer from noise pollution disturbance.

c. Interferes with normal auditory communication, it may mask auditory warning signals and hence increases the rate of accidents especially in industries.

d. The effects can range in severity from being extremely annoying to being extremely painful and hazardous lowers workers efficiency and productivity and higher accident rates on the job.

e. 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. Permanent loss, usually called Noise Induced Permanent Threshold Shift (NIPTS) represents a loss of hearing ability from which there is no recovery.

Below a sound level of 80 dB. hearing loss does not occur at all. However temporary effects are noticed at sound levels between 80 and 130 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 105 dB will experience permanent hearing loss. A sound level of 150 dB or more can physically rupture the human eardrum and >180dB can kill a person.

f. In additions to hearing losses, excessive sound levels can cause harmful effect on the circulatory system by raising blood pressure and altering pulse rates.

Noise Control Techniques:

There are 4 fundamental ways in which noise can be controlled:

(1) Reduce noise at the source

(2) block the path of noise

(3) increase the path length and

(4) protect the recipient.

1. Reduce Noise at the Source:

a. 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.

b. 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.

c. Regular and thorough maintenance of operating machinery. We should reduce mechanical run out of shafts. 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.

d. 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. Thus proper highway planning and design are essential for controlling traffic noise.

e. 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.

f. Using efficient flow techniques: for reducing noise associated with high fluid velocities and turbulence.

g. Reducing fluid jet velocities: As jet noise is proportional to the eight power of jet velocity.

2. Block the path of noise:

Through construction of temporary/permanent barriers:

a. Planting of trees around houses can also act as effective noise barriers.

b. Highly absorptive interior finish material for walls, ceilings and floors can decrease indoor noise levels significantly.

3. Increasing the path length:

Increasing distance from the noise source and the recipient offers a passive means of control:

a. Municipal land- use ordinances pertaining to the location of airports make use of the attenuating effect of distance on sound levels.

4. Protect the recipient:

a. Use of earplugs and earmuffs. Specially designed earmuffs can reduce the sound level reaching the eardrum by as much as 40 dB.

Besides these in general making Legislation, Educating and bringing awareness in the people is common for control of any pollution Example: Ban on loud speakers from 10 pm to 6 pm.

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