This document discusses noise pollution, including its sources, measurements, classifications, and effects on health. It defines noise as sound that causes irritation and outlines key parameters of sound including frequency, pressure, and intensity. Noise is measured in decibels on a logarithmic scale relative to a reference level. Noise can be classified as transport noise from vehicles, occupational noise from machinery, or neighborhood noise from loud music or appliances. Prolonged exposure to noise over 90dB can cause temporary or permanent hearing loss. Noise pollution has also been linked to psychological and pathological effects like increased stress, fatigue, and changes in heart rate or blood pressure.
Though, noise is a controllable entity of the environment, on several occasions it is found to be uncontrollable and create severe impacts on life and induce unpleasant circumstances.
Noise pollution is a public nuisance to the environment.
Though, noise is a controllable entity of the environment, on several occasions it is found to be uncontrollable and create severe impacts on life and induce unpleasant circumstances.
Noise pollution is a public nuisance to the environment.
Noise pollution project For Environmenal Management (Causes, Controls and Fut...Sudeep Malik
Whether knowingly or unknowingly, everyone of us contribute to noise pollution, because most of our day-to-day activities generate some noise. Often neglected, noise pollution adversely affects the human being leading to irritation, loss of concentration, loss of hearing.
Socials awareness programs should be taken up to educate the public about the causes and effects of noise pollution.
Identify the sources of noise pollution. Once identified, the reason(s) for increased noise levels should be assessed, efforts shall be made to reduce the undesired noise levels from (unwanted) noise generating sources.
Noise pollution, also known as environmental noise or sound pollution, is the propagation of noise with ranging impacts on the activity of human or animal life, most of them harmful to a degree. The source of outdoor noise worldwide is mainly caused by machines, transport, and propagation systems.
Solutions and Remedies for Noise Pollution
Planting bushes and trees in and around sound generating sources is an effective solution for noise pollution.
Urban Planning, Public Education and Awareness
Regular servicing and tuning of automobiles/ machinery can effectively reduce the noise pollution.
Alteration of roadway surface texture.
Buildings can be designed with suitable noise absorbing material for the walls, windows, and ceilings.
Soundproof doors and windows can be installed to block unwanted noise from outside.
Factories and industries should be located far from the residential areas.
Workers should be provided with equipment such as ear plugs and earmuffs for hearing protection.
Control in the Transmission Path, Control at Source, Control over Vibrations
Exposure Reduction
Enclosure of machines can reduce noise levels at its source very effectively.
Leakage where pipes pass through walls as well as acoustic leaks between walls, screens or enclosures, can produce large variations in the attenuation achieved. It is therefore important to seal air gaps carefully
Putting major noise sources at one place & separating it from quieter area.
Using acoustic barriers, sound absorbing linings & sound insulating partitions.
Complete or partial enclosure of noisy equipment.
Providing silencers on the intake as well as exhaust side of flow machines, like blowers, fans etc.
Insertion of damping material between machine bases and foundations and use of anti vibration mountings.
Regulations should be imposed to restrict the usage of play loudspeakers in crowded areas and public places.
International Co-operation
for Free 1000 PPT Please visit
www.realcopowerprojects.com
discuss noise at dental laboratory and office
What`s a noise pollution ?
How to measure N.P in office
Sources of noise pollution
sources of Noise pollution in dental office
Side effects of noise pollution
Prevention
Conclusion
Noise pollution project For Environmenal Management (Causes, Controls and Fut...Sudeep Malik
Whether knowingly or unknowingly, everyone of us contribute to noise pollution, because most of our day-to-day activities generate some noise. Often neglected, noise pollution adversely affects the human being leading to irritation, loss of concentration, loss of hearing.
Socials awareness programs should be taken up to educate the public about the causes and effects of noise pollution.
Identify the sources of noise pollution. Once identified, the reason(s) for increased noise levels should be assessed, efforts shall be made to reduce the undesired noise levels from (unwanted) noise generating sources.
Noise pollution, also known as environmental noise or sound pollution, is the propagation of noise with ranging impacts on the activity of human or animal life, most of them harmful to a degree. The source of outdoor noise worldwide is mainly caused by machines, transport, and propagation systems.
Solutions and Remedies for Noise Pollution
Planting bushes and trees in and around sound generating sources is an effective solution for noise pollution.
Urban Planning, Public Education and Awareness
Regular servicing and tuning of automobiles/ machinery can effectively reduce the noise pollution.
Alteration of roadway surface texture.
Buildings can be designed with suitable noise absorbing material for the walls, windows, and ceilings.
Soundproof doors and windows can be installed to block unwanted noise from outside.
Factories and industries should be located far from the residential areas.
Workers should be provided with equipment such as ear plugs and earmuffs for hearing protection.
Control in the Transmission Path, Control at Source, Control over Vibrations
Exposure Reduction
Enclosure of machines can reduce noise levels at its source very effectively.
Leakage where pipes pass through walls as well as acoustic leaks between walls, screens or enclosures, can produce large variations in the attenuation achieved. It is therefore important to seal air gaps carefully
Putting major noise sources at one place & separating it from quieter area.
Using acoustic barriers, sound absorbing linings & sound insulating partitions.
Complete or partial enclosure of noisy equipment.
Providing silencers on the intake as well as exhaust side of flow machines, like blowers, fans etc.
Insertion of damping material between machine bases and foundations and use of anti vibration mountings.
Regulations should be imposed to restrict the usage of play loudspeakers in crowded areas and public places.
International Co-operation
for Free 1000 PPT Please visit
www.realcopowerprojects.com
discuss noise at dental laboratory and office
What`s a noise pollution ?
How to measure N.P in office
Sources of noise pollution
sources of Noise pollution in dental office
Side effects of noise pollution
Prevention
Conclusion
Farhat naz mphil ph environmental and occupational healthDrFarhat Naz
it contains bassic definition of noise vs sound, noise pollution, sources, factors affecting health whether human or animal, controlling measures of noise pollution, mitigation and legislation for noise pollution.
This presentation on noise pollution covers the causes, effects, and facts related to noise and presents the ways to protect the environment from the harmful effects of noise in world and it also includes the statistics of Pakistan.
Noise Control Stratagies in Reinforced Concrete BuildingsIJRES Journal
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Artificial Reefs by Kuddle Life Foundation - May 2024punit537210
Situated in Pondicherry, India, Kuddle Life Foundation is a charitable, non-profit and non-governmental organization (NGO) dedicated to improving the living standards of coastal communities and simultaneously placing a strong emphasis on the protection of marine ecosystems.
One of the key areas we work in is Artificial Reefs. This presentation captures our journey so far and our learnings. We hope you get as excited about marine conservation and artificial reefs as we are.
Please visit our website: https://kuddlelife.org
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and write to us if you have any questions:
info@kuddlelife.org
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By studying the carbon cycle, scientists can identify carbon sources and sinks, measure carbon fluxes, and predict future trends. This knowledge is crucial for crafting policies aimed at reducing carbon emissions, enhancing carbon storage, and promoting sustainable practices. The carbon cycle's interplay with climate systems, ecosystems, and human activities underscores its importance in maintaining a stable and healthy planet.
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1. Swapnadip Roy, Assistant Professor, Department of Chemistry, Bankura Sammilani College
NOISE POLLUTION
The term “noise” is applied to the sound that causes irritation on hearing of Human
being. In fact, there is very little demarcation of sound and noise.
Sound and its general features:
Sound comprises wave motion in an elastic medium like air, water or solids (metals,
plastics, wood, bricks, etc.). Sound waves travel through the medium from the source to
the recipient or listeners. The rate of the oscillations of the medium is known as the
frequency of the sound, the unit being hertz (Hz) or cycles per second. The frequency is
the measure of the pitch of the sound received by the listeners. High frequencies imply
high-pitched sound, which are more irritating to the individual than low frequencies.
The second parameter of sound is pressure, which is measured in Newton/Sq. meter
(Nm-2). The third parameter of sound is intensity, expressed in Watt/Sq. meter (Wm-2)
i.e., the quantum of sound energy that flows through unit area of the medium in unit
time.
Noise and its measurements:
Two important parameters sound/noise are sound pressure and sound intensity. They
are measured in different units giving varying scale of magnitude. The common
scientific acoustic unit is the decibel (dB). It is not absolute physical unit, it is a ratio
expressed as a logarithmic scale relative to a reference sound pressure level.
1 decibel (dB) = 10 log 10 (intensity measured/reference intensity)
The logarithmic scale takes care of wide range of sound, pressure and intensities. The
reference intensity used is the threshold of hearing which means sound which can be
first heard at a sound pressure of 2 x 10-5 Nm-2 or sound intensities of 10-12 Wm-2.
L10 (18 hour) Index:
This is used for traffic noise measurement, adopted in UK for noise legislation. The
index is expressed in dBA – it is the arithmetic average hourly values of the noise level
exceeded for 10% of the time over 18 hours between 06.00 and 24.00 hours on any
normal weekday. It includes peak noise values and fluctuation of noise depending on
the type of vehicle and traffic density.
2. Swapnadip Roy, Assistant Professor, Department of Chemistry, Bankura Sammilani College
Noise Classification:
Noise can be broadly classified under three categories: (1) Transport noise, (2)
Occupational noise, (3) Neighbourhood noise.
Transport Noise:
This can be sub-divided into (a) Road traffic noise, (b) Aircraft noise and (c) Rail traffic
noise.
(a) Road traffic noise: Vehicles on road produce irritation for more people than any
other noise source. Traffic speed is one of the major cause of noise. The noise
volume increases with increase in traffic speed. Traffic noise is accurately
measured in dBA and noise level is given on the L10 (18 hours) index.
Situation Avg.Traffic Speed(km/h) L10 (18 hours)index(dBA)
Residential road, parallel to
busy main road
48 60
18 m from busy main road 48 70
18 m from highway with
high volume of heavy
vehicles
96 80
3 m from main road in
residential area
48 80
The limits for diesel or petrol engined cars are 70 dBA in UK, 83 dBA in France and 80
dBA in India.
(b) Aircraft noise: It differs from road traffic noise in the sense that it is not
continuous but intermittent. There are peak noise level when aircrafts fly
overhead or take-off and land at airports.
(c) Rail traffic noise: This is not a serious nuisance as compared to the previous
types of traffic noise. The noise is generally of lower frequency than that of street
vehicles and furthermore, most railway tracks run through rural areas.
Occupational Noise:
This is mainly produced by industrial machines and processes which affects millions of
people. It also includes noise from domestic gadgets e.g., washing machines, vacuum
cleaners etc. Industrial workers are exposed to noise for 8 hours per day and 6 days per
week. Noisy industrial processes and conditions cause hearing loss to the workers
3. Swapnadip Roy, Assistant Professor, Department of Chemistry, Bankura Sammilani College
involved. Millions of workers are victim of occupational noise for up to 1800 hours per
year and for 30 years of their lives.
Neighbourhood Noise:
This implies variety of sources of noise which disturb and annoy the general public by
interfering with their comfort and welfare. Such sources are loud TV and radio sets,
loudspeakers in public function and entertainments etc. Disco music and dance in late
evenings cause noise nuisance to nearby residents.
Permissible Noise Levels:
In this age, many people work and live in environments where the noise level is not
hazardous. But over the years, they suffer from progressive hearing loss and
psychological hazards including tension.
The maximum permissible noise levels are summarized as follows,
Situation Permissible noise (dBA)
Road traffic near residential areas 70
Ear protection to be worn 85
Factory work for 8-hr day & 6 day week 105
Prolonged noise causing permanent damage 100
Ear-drum rupture 180
Lung damage 195
Effects of Noise Pollution:
The effect of noise on health is numerous. It can affect central nervous system, cause
nausea, vomiting, deafness, loss of appetite, loss of sleep and even cardiac failure.
Hearing Damage and Noise Exposure:
There is no doubt that noise can damage the ear and cause temporary or permanent
noise-induced hearing loss, depending upon the intensity and duration of the sound
level. The most commonly occurring ear damage is caused by continuous periods of
high intensity noise. If the ear receives a noise level over 90 dB in the mid high
frequency range more than a few minutes, then the auditory sensitivity is reduced. The
effect is called the temporary threshold shift and can result in a sound of 4000 Hz
frequency requiring a noise level of 20 dB to be heard, instead of 5 dB under normal
conditions.
4. Swapnadip Roy, Assistant Professor, Department of Chemistry, Bankura Sammilani College
Pathological and Psychological Disorders:
Pathological effects can result from particular noise frequencies causing vibration or
resonance in materials or people’s bodies. High frequencies, or ultrasonic sound above
the normal audible range, can affect the semi-circular canals of the inner ear and cause
nausea or dizziness. Alternatively, very low frequencies noise can cause resonance in
the body organs, producing the effects of decreased heart beat, variations in blood
pressure and breathing difficulties.
Non-pathological or psychological noise effects are also variable and very difficult to
measure. The mildest effect is often physical or mental fatigue and lack of
concentration. This effect is important in industrial situation, because it results in low
efficiencies, a reduced work rate, increased absenteeism, and a higher potential for
accident and injuries.