# NOISE POLLUTION IN JAPUR CITY by pltTYh

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```									   GOOD
AFTERNOON
INTRODUCTION
During the last 25 years, a wave of
environment consciousness and
concern is being developed in India
and world
But noise pollution is much ignored,
an important environment pollutant
What is noise?
Major cause
traffic
NATURE OF NOISE
Definition of sound
Production of sound
Sound terminology
Pitch, Frequency, Intensity,
Waveform, Amplitude, Loudness,
Perceived Noisiness, Annoyance
Kinds of noise
Noisy, Abrasive, Soothing,
Displeasing
UNIT OF SOUND
 Measurement of noise is a complicated
subject
 The basic unit of sound is Decibel (dB)
 If the amplitude of pressure fluctuation is
P, then the sound level is give by,
L=10 log (P /Po)2 dB
where Po =2*10-5 N/m2 (a reference
pressure)
 Thus dB is based on a ratio of pressure
and so is dimension less
 Reason for the logarithmic nature of
decibel
SOUND FIELD
There are 3 types of sound fields
The near field
The far field
The diffuse field
Impulse of Impact Sound
Ultra sound and Infra sound
Range of Human Ear
INTENSITY OF SOUND
The ISO noise intensity level as:
L = 20 log (P/Po) =10 log (I/Io)
S.No. Sound Pressure Intensity Intensity level
N/m2         W/m2         dB

1.     2x10-5        10-12         0
2.     2x10-4        10-10        20
3.     2x10-3        10-8         40
4.     10x10-2       10-6         60
5.     2x10-1        10-4         80
6.     2x(20o)       10-2         0
7.     2(2x10)      10(10o)      120
8.   200x(2x102)    100(102)     140
NOISE POLLUTION IN JAPUR
CITY
Noise pollution increasing at the
rate of 1 dB per year at world
level
Jaipur has also been affected by
this
Jaipur noise pollution study
includes
Sources of noise
SOURCES OF NOISE
Community Noise Sources
Loudspeaker
Construction Work
Traffic Noise
Aircrafts
Industrial Noise
Source        Respondent in %

Aircraft          10
Train            15
Industries          1
Construction         1
Hone sources         2
Home equipment’s      2
Other noise          6
Not asscerlausted     8
100%
EFFECTS OF NOISE ON
HUMANHEALTH
21st century will be a noisy
century
Effects on Human
Subjective Effects
Annoyance
Disturbance, Dissatisfaction
Noisiness
Fatigue
Behivoural Effects
Sleep Interference
Speech Interference
Separation Normal Raised Very loud Shouting
distance(m) Effort
0.15      74    80      86        92
0.30      68    74      80        86
0.60      62    68      74        80
1.20      56    62      68        74
1.80      52    58      64        70
3.70      46    52      58        64
Physiological Effects
Short term effects
Long term effect
Hearing loss
Effect on body functions
Activation of sympathetic functions
Affects on the production system
Slow down the detoxifying functions of
liver
Increase heart rate and blood pressure
Effect on vision and balance
Effect on Worker’s Efficiency
Reduction of noise from 96 dB to 87
dB increase performance by 12%

Effects on Wild Life
Production of eggs & milk affected

Effect on Non Living Things
Building cracks, Shattering, Cracks in
walls, Loosening of plaster etc.
CONTROL OF NOISE
Basic principle of noise control are

Noise control at source
Control along transmission path
Legislation
Awareness and education of
people
Noise control at source
Proper Designing
Proper Operation
Proper maintenance

Noise control along the path
Sources must be properly located
Barriers- solid, heavy & high
Modification in sound path
Use of abrasive material
Masonry screens & partial enclosures
Isolation of noisy equipment and
process
Double glazing the windows
Sound insulation for roofs &
walls
Sealing doors & openings
Ear protection devices

Legislation
Awareness & Education
Noise pollution law in India
Originally did not have any law
42nd amendment of constitution
in 1976 inserted art. 48A &51A
The environment protection act
1986 has become effective on
Nov. 12,1986
CONCLUSION
Earlier emphasis used to given
on air pollution & water pollution
Noise pollution was almost
neglected
given to noise pollution
Noise is increasing at the rate of
1dB per year in all urban
environment
CONCLUSION…
Noise affects human health
Whole society is responsible
Road traffic is the main source
RECOMMENDATION
Awareness in public
Measure should be taken to