Sound pollution pdf free download

There is a need to implement some prevention to savings the animals and humans from its bad effects. All you need to do is just click on the download link and get it. If you liked it then please share it or if you want to ask anything then please hit the comment button. Your email address will not be published. This site uses Akismet to reduce spam. Learn how your comment data is processed. Related Posts. Thanks for the noise pollution Reply. Primary poll utants: Pollutants that are emitted directly from either natural events or from human activities are called primary pollutants.

The natural events are dust storms; volcano etc and human activities can be emission from vehicles, industrial wastes. Secondary pollutants: Primary pollutants when reacting with each other or from basic components of air, forms a new pollutant called secondary pollutants. Sulfuric acid H 2 SO 4 and nitric acid component of acid rain.

Unstable and need higher stacks. Emitted plume will neither go up nor go down and would be trapped in between and thus termed as trapping plume. The environment is highly stable. The emission will spread only horizontally.

Such plume has minimum downward mixing as its downward motion is prevented by inversion. Permissible noise level standards in the daytime dB. Permissible noise level standards at night dB. The correct answer is- industrial burning of coal and other fossil fuels. Important Points. Key Points Explanation:. Hence, dB is the correct answer. Motor engines, burning coal, oil and wood, industrial activities, smoke.

Rotten egg smell, irritation of eye, headache, nausea, loss of sense of smell, impairment of nervous system. The amplitude of a sound wave determines its loudness or volume.

A larger amplitude means a louder sound, and a smaller amplitude means a softer sound. Additional Information. Environment is highly stable. Emission will spread only horizontally. Emitted plume will neither go up nor go down. Copper sulfate is not responsible for ozone depletion. Certain recent human activities have injected certain chemicals in the stratosphere which consumes ozone and reduces its concentration.

Depletion is mainly caused by chlorofluorocarbons CFCs , halons, methyl chloroform, hydrochloric acid, and carbon tetrachloride. These chemical substances are mainly either chlorine or bromine-based which can reach the stratosphere and catalytically break down ozone into oxygen.

Ozone is a form of oxygen that has three atoms O 3. It is formed in the upper atmosphere by the action of solar radiation on the oxygen molecules. It is found in the form of a thin layer in the stratosphere between 15 to 48 km. It absorbs ultraviolet radiation from the sun which is biologically destructive in many ways.

It causes skin cancer and cataracts, suppresses the human immune system, and disrupts the aquatic food chain by killing micro - organisms on the ocean surface. Coal based thermal power plants are known to pump out a lot of greenhouse gases and ash, which are by-products of burning fossil fuels. This ISO Recommendation defines the reference sound power and sound intensity and recommends one picowatt as the reference sound power and one picowatt per square meter as the reference intensity.

Sound pressure level SPL is a logarithmic measure of the RMS sound pressure of a sound relative to a reference value the threshold of hearing. It is measured in decibels dB.

The following graph illustrates L 10 , L 50, and L The presence of excessive or unwanted sounds in the environment is called noise pollution. Major causes of noise pollution are sounds of vehicles, explosions including the bursting of crackers, machines, loudspeakers, etc.

Television and transistor radio at high volumes, some kitchen appliances, desert coolers, air conditioner. Confusion Points. Noise pollution may have a suppressive effect on immunity because of stress created which will alter the immunity.

Any kind of pollution has an effect on our immune system, but its effect is less and indirect as compared to air or water pollution. Hence, from the given options, Noise pollution can cause problems like sleeplessness, speech interference, an increase in blood pressure, a shift in the threshold of hearing.

Statement I: Two sounds of the same intensity but different frequency characteristics may appear to be of different loudness. Statement II: The response of the human ear to noise of different frequencies is not uniform. In the light of the above statements, choose the most appropriate answer from the options given below:.

Start Learning. Learn today! The correct answer is dB. Noise above dB can cause biochemical changes in human bodies. Additional Information Section 2 a of the Air Prevention and Control of Pollution Act, , includes noise in the definition of pollutants.

The frequency range between Hz is an audible range for the human ear. A firecracker generally generates about dB of noise. According to a report by the European Commission, 1. In industrial areas , the permissible limit is 75 dB for daytime and 70 dB at night.

In commercial areas , it is 65 dB and 55 dB, while in residential areas it is 55 dB and 45 dB during daytime and night respectively. Get Started for Free Download App. Ohm Decibel Joule Ampere. Noise pollution is measured in Decibel. The decibel dB is a logarithmic unit used to measure sound level. It is also widely used in electronics, signals and communication. In ordinary usage, specification of the intensity of a sound implies a comparison of the intensity of the sound with that of a sound just perceptible to the human ear.

In simple terms, the dB is the ratio between two power levels expressed in logarithmic terms with relation to some reference level. A busy office may be about 60 dB while the noise level on a footpath beside a busy road might be approximately 75 dB.

A departing jumbo jet may result in dB being recorded along the runway. Ohm is the SI unit of electrical resistance , transmitting a current of one ampere when subjected to a potential difference of one volt. Joule , unit of work or energy in the International System of Units SI ; it is equal to the work done by a force of one newton acting through one metre.

Ampere is a unit of electric current equal to a flow of one coulomb per second. Answer Detailed Solution Below Option 4 : a type of weighting used in the measurement. Very low or high frequencies are given less weight than on the standard decibel scale. Many regulated noise limits are specified in terms of dB A based on the belief that dB A is better correlated with the relative risk of noise-induced hearing loss.

Compared to dB, dB A is a type of weighting measurement used that underestimate the perceived loudness, annoyance factor, and stress-inducing capability of noises with low-frequency components, especially at moderate or high volumes of noise. Answer Detailed Solution Below Option 4 : a, b, c, d and e. The correct answer is a, b, c, d and e. Key Points Adverse effects of noise pollution There is a partial loss of hearing deafness It affects the reproductive system.

A foetus may develop defects. It affects human performance in tasks requiring communication skill and thinking. It causes high Blood Pressure B. Additional Information 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.

The unpleasant and unwanted sound is called as noise. Sources of noise pollution: The main sources of noise pollution are various modes of transportation, industrial operations, construction activities and celebrations, electric home appliances. Causes of noise pollution: It exists mostly in densely populated areas like cities and industrial complexes, railway stations, bus stations, air ports, television, radio, and even kitchen gadgets generate noise.

Sound levels are measured in units called decibels. Conservation produces sound at about 40 decibels and so on. The limit that humans can accept is about decibels without pain and damage.

Effect of noise: Noise causes the following effects:. Control of noise pollution: The noise pollution can be controlled by the following:. The figure is the diagrammatic representation of the effects of noise pollution:. Fig2: effects of noise pollution.