Noise:-

It is high intensity of undesirable sound. It is measured in desirables (dB).

Important:- More than 150dB sound is generated during take up of aeroplane or get planes or rockets.

• It causes permanent impairing in hearing.
• Some time chronic sound in cities for long duration may loss the hearing ability.
• Noise causes increases in heart beat, sleeplessness, alteration in breathing, irritation.

Control of Noise pollution:-

• Formation of sound proof building.
• Use of good sound absorbant.
• Strictly follow of horn free zone near school and hospital.
• Shifting of noise producing industry in zone population density area.
• Use of cotton plug.
• Use of green muffler or green belt.