This presentation is useful to all the students who studied and get information about noise pollution. It gives a basic knowledge about noise pollution and also useful for them who study in environmental engineering or civil engineering or science.

1. WELCOME
Name: Panchal Dhrumil Indravadan
Activity: ES(ALA)
Branch: Computer Engineering(B.E.)
Semester: Second Sem
Year: 2017-18

2. Topic
 Introduction of Noise Pollution
 Sound and Noise
 Noise Measurement
 Ambient Noise Standard
 Sources of Noise Pollution

3. Noise pollution
 Noise pollution can be defined as unpleasant and
unwanted sound.
 The presence of unwanted and unpleasant sound in the
atmosphere, which may causes discomfort is called
“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”.

4. Noise pollution

5. Sound and noise
 Sound is what we hear.
 Sound is a physical phenomenon that stimulates the
sense of hearing, in human beings hearing takes place
whenever vibration of frequencies between about 15 to
20,000 hertz reach the inner ear.

6. Sound and noise
 Noise is unpleasant and unwanted sound.
 Noise may be defined as any sound that can produce an
undesirable effect to living especially human either
physiologically or may interfere with personal, social or
group activities or work or communication or rest or
recreation or sleep.
 Noise is measured by sound level meter.

7. Sound and noise

8. Sound Measurements
 Sound pressure:
 It is the amount of air pressure fluctuation created by the
source of the sound.
 Sound pressure is expressed as Pascal.
 A healthy young person can hear sound pressure is low
pressures as low as 0.00002 Pa.
 Sound power:
 It is the sound energy transferred per second from the
sources (sound) to the air.
 Power is expressed in watts (W).

9. Sound Measurements
 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 level and
sound pressure level.
 It is a ratio expressed on a logarithmic scale. This
logarithmic scale takes care of wide range of sound
power, intensity and pressure.
 dB = 10* log (A/A0)
 In general, dB of the quantity A, relative to the reference
quantity A0 is defined as above.

10. Ambient Noise Standards
Area
code
Category of
Area
Limits in
db(Day)
Limits in
db(Night)
A Industrial area 75 70
B Commercial
area
65 55
C Residential area 55 45
D Slience zone 50 40

11. Sources of noise pollution
 Following are the main sources of noise pollution
 1. Traffic sources
 2. Industrial sources
 3. Constructional sources
 4. Other miscellaneous sources

12. Sources of noise pollution
 Traffic Sources:
 Noise created by various means of transport like trucks,
tractors, buses, trains, aeroplanes, etc. are the traffic
related source of noise pollution.
 It may be in the form of:
 Horn of vehicles
 Raise of accelerator
 Vehicle with damaged silencer
 Noise produced by a diesel car will be more than that
produced by a petrol car.
 A jet aircraft will produce more noise than a propeller type
of aircraft.

14. Sources of noise pollution
 Industrial Sources:
• Noise is the essential by product of industry, its intensity
and nature being dependent upon the type of industry.
• Industrial noises are usually produced by:
• Reciprocating or rotating machinery
• Cutting of materials, grinding
• Blow hammers
• Generators
• High pressure and high velocity gases, etc.

16. Sources of noise pollution
 Constructional sources:
• Noises produced by various constructional activities are:
• Rock crusher for production of aggregate
• Pile driving equipment
• Boring and drilling equipment
• Road rollers
• Materials handling by conveyers
• Rock blasting

18. Sources of noise pollution
 Other miscellaneous sources:
 In residential area – loud voice of T.V., music systems,
radio, etc
 Public address system – public functions, Navratri festival
etc.
 Sirens – Police van, industries, ambulance
 Military sources – noise of bomb, grenade explosion,
tanks other vehicles, missiles etc.
 Use of crackers during Diwali and other celebrations.
 Shouting of hawkers at market places
 Playing of children at play ground.

20. Conclusion

21. References
 Inspiration from Prof. Pinal Patel and Prof. Falguni Patel
 Different Textbook of Environmental Studies
 Some notes about Noise Pollution
 Image from Google images
 Some my own knowledge

22. Thank You