2. How Loud Is Too Loud ?
Noise induced hearing damage is related
to duration and volume of exposure
Safe Exposure limit is 85 Decibels for
Eight hours a day
3. Sound & Noise
Sound is a form of energy which is emitted by a vibrating body
and on reaching the ear causes the sensation of hearing
through nerves
The frequency limits of audibility are from 20 HZ to 20,000
HZ , Sounds of frequencies less than 20 HZ are called
infrasonics and greater than 20,0000 HZ are called ultrasonics
The word noise is derived from the Latin term nausea. It has
been defined as unwanted sound, a potential hazard to health
and communication dumped into the environment with regard
to the adverse effect it may have on unwilling ears
5. Measurement
The intensity of sound is measured in sound pressure levels
(SPL) and common unit of measurement is decibel, dB.
The zero on a decibel scale is at the threshold of hearing, the
lowest sound pressure that can be heard, on the scale.
on the scale 20 db is whisper, 40 db the noise in a quiet office .
60 db is normal conversation, 80 db is the level at which sound
becomes physically painful.
The Noise quantum of some of the cities in our country
indicate their pitch in decibel in the nosiest areas of
corresponding cities, e.g. Delhi- 80 db, Kolkata - 87,Bombay-
85, Chennai-89 db etc.
6. Sources of Noise
The noise pollution has two sources, i.e. industrial and non-
industrial
he industrial source includes the noise from various industries
and big machines working at a very high speed and high noise
intensity
Non- industrial source of noise includes the noise created by
transport/vehicular traffic and the neighborhood noise
generated by various noise pollution can also be divided in the
categories , namely, natural and manmade
7. Sources of Noise
Road Traffic Noise
Air Craft Noise
Noise from railroads
Construction Noise
Noise in Industry
Noise in building
Noise from Consumer products
8. Noise Levels of Sources
Source Noise level
dB
Source Noise level,
dB
Air compressors 95-104 Quiet garden 30
Diesel generator 95 Ticking clock 30
Milling machine 112 Computer rooms 55-60
Power operated
portable saw
108 Type institute 60
Trucks 90-100 Printing press 80
Car horns 90-105 Sports car 80-95
Jet takeoff 120 Trains 96
9. Harmful Effects
Decreases The Efficiency Of A Man
Lack Of Concentration
Fatigue
Abortion Is Caused
It Causes Blood Pressure
Temporary Of Permanent Deafness
Effect On Vegetation Poor Quality Of Crops
Effect On Animal
Effect On Property
Sleeplessness
10. Control of Noise Pollution
Noise Control at Source
Reducing the noise levels from domestic sectors
Maintenance of automobiles
Control over vibrations
Low voice speaking
Prohibition on usage of loud speakers
Selection of machinery
Maintenance of machines
11. Control of Noise Pollution
Control in the transmission path
Installation of barriers
Design of building
Installation of panels or enclosures
Green belt development
Using protection equipment
Job rotation
Exposure reduction
Hearing protection
12. Legal Control
Constitution of India
Right to Life
Right to Information
Right to Religion and Noise
Directive Principal of State Policy
Fundamental Duties
Cr.P.C. Section 133
I.P.C. Public Nuisance 268-295
Law of Torts Noise pollution is considered as civil wrong
Factories Act Reduction of Noise and Oil of Machinery
Motor Vehicle Act. Provision Relation to use of horn and
change of Engine
Noise Pollution Control Rule 2000 under Environment
Protection Act 1996
13. Conclusion
We have made the law relating to noise pollution but there is
need to creating general awareness towards the hazardous
effects of noise pollution
Particularly, in our country the people generally lack
consciousness of the ill effects which noise pollution creates ad
how the society including they themselves stand to beneficiary
preventing generation and emission of noise pollution
The young children of impressionable age should be motivated
to desist from playing with firecrackers, use of high sound
producing equipments and instruments on festivals, religious
and social functions, family get-togethers and celebrations etc.
which cause noise pollution
state must pay its role by the support and cooperation of non-
government organizations (NGOs) can also be enlisted.