Noise-Pollution


 
 
Concept Explanation
 

Noise-Pollution

Noise Pollution: Noise is generally an unwanted sound, or a sound with which the modern civilisation would not put up. Noise produces several adverse effects on the quality of man's surroundings, and is therefore, considered to cause pollution of the environment. The loudness causes physical discomfort and temporary or permanent damage to hearing., Noises above 85-90 decibels are considered dangerous. The WHO has- recommended a tolerance limit of 45 decibels for noise level at night and 55 decibels for daytime

Prolonged exposure to higher noise levels leads to hearing loss and nervous and emotional tension.

Noise Control Measures: The means of noise control are:

(1) To manipulate the source so as to reduce the noise at its origin

(2) To interrupt the path of transmission

(3) To protect the recipient

Legislation and public policy are essential. Standards for noise control measures should be set for industry and community. The path of the sound can be interrupted by using various materials that absorb the sound energy. Acoustic materials and mufflers can also be used.

Anti-Pollution Measures: Pollution is inevitable and measures to prevent pollution or reduces effects have grown rapidly in recent times. Action against pollution takes a variety of forms. Most countries including India have anti-pollution legislation. Recycling of materials may be done; for example glass bottles, newspapers, metals from old vehicles can all be recycled. There can be research into the use of cleaner, renewable sources of energy, for example, solar, wind and tidal energy. Modification industrial processes to make use of waste materials or to render them harmless before discharg another anti-pollution measure.

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