1. NOISE POLLUTION
Noise:
• Noise is an unwanted sound
• It interferes with our every activity
• Whether it is work, rest, recreation or sleep.

2. Source:
• Man made noise developed
• From mechanical vehicles truck, scooters, fire
engines police cars, ambulance etc.

3. Other Sources:
• Shouting, barking of dogs, social gathering,
marriage and birth day parties
• Sound pressure expressed in decibels (db)
• Sound begins to damage our hearing when it
is above 85 db (for about 8 hours period)

4. Effects:
1. Auditory effects: Hearing loss and speech
interference
2. Sleep disturbance
3. Task performance rating
4. Cardiovascular arrest

5. Health effects of Noise
• Health not mere absence of disease
• Physical and psychological well being
• Noise develop annoyance, irritation, disturb
sleep, rest, communication
• Noise can damage ear
• Continuous periods of high intensity noise
damage ear
• Sudden excessive noise of 150 db or have
damaging effect of human ears

6. Annoyance:
• Feeling of displeasure
• In urban areas, traffic is the main cause of
annoyance
• Noise of industries, trucks, trains, cars
• Annoyance impair performance lower out put,
efficiency, tension nervous irritability, strain

7. Sleep Disturbance:
• Sleep restores health or strength
• It renews energy
• It causes difficulty in falling asleep

8. Task performance and cardio-vascular
system:
• Development of fatigue
• Task performance became poor
• Pregnant women may be at risk
• Changes in blood pressure, heart beat
• Headache, insomnia, loss of appetite
• Construction of blood vessels
• Heart ailment
• Noise can cause heart attacks
• It causes hyper tension, deafness

9. Noise Control Techniques:
• Planting more trees in high ways
• Ban on unnecessary blowing of horns
• Not to exceed speed limit
• To develop quieter type of diesel engines
• To improve road surface
• Restriction of movement of vehicles in silence
zones
• Legal restrictions on noise polluting bodies
• Improvement in silencers