Any unwanted, disturbing or harmful sound that impairs or interferes with hearing, causes stress, hampers concentration and work efficiency or causes accidents called noise pollution.

1. Noise Pollution
• Any unwanted, disturbing or harmful sound
that impairs or interferes with hearing,
causes stress, hampers concentration and
work efficiency or causes accidents called
noise pollution.

2. Sound and Noise
The word noise comes from the Latin word noxia
meaning "injury" or "hurt“. Noise is an unwanted,
unpleasant and annoying sound caused by vibration of
the matter.
Vibrations impinge on the ear
drum of a human or animal and
setup a nervous disturbance,
which we call “sound”.
When the effects of sound are
undesirable that it may be termed
as “Noise”.

3. Noise measurements
Sound pressure:
• It is the amount of air pressure fluctuation
created by the source of sound.
• Sound pressure is expressed as Pascal.
Sound power :
• It is the sound energy transferred per second
from the source to the air.

4. • Sound pressure level (SPL):
• Sound pressure converted to the decibel
scale is called sound pressure level.
• Decibel(dB) is used in environmental noise
pollution as a measure of sound power level,
sound intensity and sound pressure level.

5. Ambient noise standards
Area code category Limits in dB
Day Night
A Industrial area 75 70
B Commercial area 65 55
C Residential area 55 45
D Silence zone 50 40

6. Sources of Noise Pollution
• Road Traffic noise
• Air Craft
• Construction Noise
• Noise in Industry
• Noise from Consumer products
• Loud Speakers / Public Address Systems
• Firecrackers

7. ROAD TRAFFIC NOISE
In the city, the main
sources of traffic noise
are the motors and
exhaust system of
autos, smaller trucks,
buses and motorcycles.
AIR CRAFT NOISE
Now-a-days , the problem
of low flying military
aircraft has added a new
dimension to community
annoyance.

8. Construction Noise
• The noise from the
construction of highways,
city streets, and buildings is a
major contributor to the
urban scene.
• Construction noise sources
include pneumatic hammers,
air compressors, bulldozers,
loaders, dump trucks.

9. Noise from Consumer products
Certain household equipment, such as vacuum
cleaners, mixers and some kitchen appliances are
noisemakers of the house. Though they do not cause
too much of problem, their effect cannot be neglected.
Loud Speakers
Use of loud speakers / public address systems in
functions, meetings, religious places in open areas is a
source of serious nuisance.
Fire crackers
Use of firecrackers with high noise level may harm the
human hearing system.

10. Impact of Noise Pollution
- Permanent hearing loss
- Annoyance
- Health effects
- Interference with communication
- Working efficiency

11. Impact of Noise Pollution
The effects of Noise Pollution on Human Being, Animal and
property are as follows:
• Hearing Impairment
• It Decreases the
Efficiency of A Man
• Lack of concentration
• It Causes Heart Attack
• Depression
• Temporary or permanent
Deafness
• Aggressive Behavior
• Effect on Vegetation
(Poor Quality of Crops)
• Sleep interference
• Speech interference

12. Control of Noise pollution
• Reducing the Sound Producer
• Interrupting the Path of the Source
• Protecting the Recipient
• Industrial Noise Control
• Community Noise
• Noise in the Home

13. Thank You