Noise pollution,sources,causes and effects

Presented to
Sir Zahidullah
Presented by
Saba Shahzadi

Topics to be learned:
 Noise: Concept and Characteristics
 Noise Pollution
 Sources of Noise Pollution
 Causes of Noise Pollution
 Effects of Noise Pollution
 Control of Noise Pollution
 Conclusion

Sound
 Sound is a vibration that propagates as
a mechanical wave of pressure and
displacement, through some medium
(i.e. air or water).
 Sound refers to only those vibrations
with frequencies that are within the
range of hearing for human.

Noise
 Noise is basically any unwanted sound.
 It is measured in dB units.
Sound Noise

Characteristics of Noise
 Sound pressure
 Frequency
 Duration
 Time of the day
 Location
 Intermittency

Kinds of Noise
 Continuous
 Variable or Intermittent
 Impulse or Impact
Kinds of noise which affect analysis
 Chemical Noise
 Instrumental Noise

Variable Noise
Impulse Noise
Continuous Noise

Instrumental Noise
 Thermal Noise
 Flicker Noise
 Shot Noise
 Environmental Noise

Noise Pollution
Noise pollution refers to a type of
energy pollution in which distracting,
irritating or damaging sounds are freely
audible.
In this type of pollution contaminants are
not physical particles, but waves which
interfere with the naturally occurring
waves of a similar type in the same
environment.

Noise pollution,sources,causes and effects

Sources of Noise Pollution
 Household Sources
 Social Events
 Commercial and Industrial Activities
 Transportation

Household Sources
 Food Mixer
 Grinder
 Vacuum Cleaner
 Washing machine and Dryer
 Air Conditioner
 Straighter and curlers
 Cooler
 TV
 iPods and Earphones
 Loud speaker
 Neighbor's Barking Dog

Social Events
 Places of Worship
 Discos and Gigs
 Parties
 Markets where people sell goods with
loudspeaker.
When these events are not often, they can
be termed as nuisance rather than noise
pollution.

Commercial and Industrial
Activities
 Printing Presses
 Manufacturing Industries
 Construction Sites

Sources of Construction Noise
 Pneumatic Hammers
 Air Compressors
 Bulldozers
 Loaders
 Dump Trucks
 Pavement breakers

Sources of Industry Noise
 Fans
 Motors
 Compressors mounted outside
This interior noise sources have significant impacts on
industrial workers, among whom noise induced
hearing loss is unfortunately common

Transportation
 Road Traffic Noise
 Aircraft Noise
 Noise from Rail Roads

Causes of Noise Pollution
 Poor Urban Planning
 Sounds from Motor Vehicles
 Sounds from Musical Instruments
 Car Alarms
 Office Equipment
 Factory Machinery
 Construction Work
 Barking Animals
 Appliances
 Audio Instruments
 Loud Speakers
 Noise Created by People

Effects of Noise Pollution
 Effects on Human
 Effects on Animals
 Effects on Environment
(Vegetation, Property)

Effects on Human
 Hearing Impairment
 Interference with Spoken
Communication
 Decrease in Efficiency
 Lack of Concentration
 Fatigue
 Sleep Disturbances
 Cardiovascular Disturbances

Continued……
 Disturbance in Mental Health
 Impaired Task Performance
 Negative Social Behavior and
Annoyance reactions
 Abortion
 Abnormal Fetus
 Temporary or Permanent Deafness

Diseases Caused by Noise
Pollution
 High Blood Pressure
 Heart Attack
 Cancer
 Asthma
 Coughing, wheezing
 Deafness
 Annoyance
 Stress
 Anxiety
 Reduced lung development
 Bronchitis
 Insomnia
 Arterious Clerosis

Effect on Animals
 Damages Nervous system
 Altering Prey/predator detection
 Creates problems in Navigation
 They become Dangerous and Attacking
 Raise Metabolism
 Reduction of useable Habitat
 Death of Certain Species
 Genetic and Evolutionary Problems

Continued…..
 Hormone imbalance
 Chronic Stress
 Panic and Escape Behavior
 Abandonment of Offspring
 Injury
 Loudness of Interspecies
Communication

Effects on Environment
 Breakage of Earth Barrier
 Poor Quality of Crops
 Damages Buildings, bridges and
Monuments
 Weakens the Edifice of Building

Control of Noise Pollution
 Control at Source
 Control in the Transmission Path
 Using Protective Equipment

Control at Source
 Reducing the Noise Levels from Domestic
Sectors
 Maintenance of Automobiles
 Use of Economic instruments
 Control over Vibrations
 Low Voice Speaking
 Prohibition on Usage of loudspeakers
 Selection of Machinery
 Maintenance of Machines

Control in the Transmission
Path
 Installation of Barriers
 Installation of Panels and Enclosures
 Green Belt development

Using Protection Equipment
 Job Rotation
 Exposure Reduction
 Hearing Protection
 Protection at the Receiver End

More Noise Control Techniques
 Sound insulation
 Sound Absorption
 Vibration Damping
 Vibration Isolation
 Urban Planning
 Public Education and Awareness

Conclusion…
To protect healthy life, there is an
urgent need to come up with an
enforceable law on Noise
Pollution in each state.

Noise pollution,sources,causes and effects

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