VPE 511: Environment and Environmental Hygiene (2+1)

EFFECTS OF THERMAL POLLUTION

• Auditory System
• Medical research confirmed that, noise pollution cause human auditory failure, temporary, permanent or acoustic trauma.
• Annoyance
• A noise is said to be annoying if an exposed individual or a group of individuals would reduce the noise, avoid or leave the noisy area if possible. Both loudness and annoyance increase with increasing sound level.
• Effect of Human Performance
• Noise increase accident levels, percentage of rejection in the work place. A risk of hostile behavior of human also reported due to noise.
• Effect of Circulatory System
• Noise reduces the blood supply by shrinking blood vessels. It causes headache and temporary laziness.
• Effect of Nervous System
• Noise stimulates nervous system, which causes irregular heart beat. Prolonged exposure of noise causes nervous breakdown and temporary deafness. It makes man sleepless and disturbs brain.
• Other Effects
• Noise levels of 150 Db can cause a rash under the collar, in between fingers, and the thighs. It can cause dizziness nausea and vomiting.
• Loud noise increases the heart beat of foetus of a pregnant woman.
• Very high noise can damage buildings develop cracks.