NOISE POLLUTION IN JAPUR CITY

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NOISE POLLUTION IN JAPUR CITY Powered By Docstoc
					   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
             Road traffic
               Aircrafts
Industrial Noise
 Source        Respondent in %

 Road traffic        55
   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
     Increased secretion of adrenalin
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
Control at the receiver
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
Noise control at the receiver
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
But nowadays some attention is
 given to noise pollution
Noise is increasing at the rate of
 1dB per year in all urban
 environment
        CONCLUSION…
Noise affects human health
 adversely
Whole society is responsible
Road traffic is the main source
     RECOMMENDATION
Awareness in public
Measure should be taken to
 minimise noise from road traffic
Proper legislation
Proper planning of city for
 different types of vehicles
Noise level study must be
 conducted for big cities regularly
THANKYOU

				
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