Article about 150 words on the topic "noise pollution in air"
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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 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.
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