Noise pollution

Noise pollution in traffic congestion spots
10min presentation

1. Noise Pollution At Traffic Congestion Spots And Methods To Control

2. Introduction Noise pollution or noise disturbance is the disturbing or excessive  noise  that may harm the activity or balance of human or animal life . Noise is considered as environmental pollution, even though it is thought to have less damage on humans than water, air or land pollution. But people who are affected by severe noise pollution know that it is a massive issue that needs attention.  Noise (or sound) is measured in the units of decibels and is denoted by the dB .

3. Introduction The source of most outdoor noise worldwide is mainly caused by  machines  and  transportation systems, motor vehicles, aircraft, and trains.

4. Source

5. Traffic Noise Pollution Road traffic noise is the most important major source of community noise specially near an important road with high volume of traffic of any major city. In developing country like Pakistan & India where Roads are in bad condition, and poorly maintained and has considerable number of vehicles of outdated technology , the road traffic noise assumes much more importance.

6. Traffic Noise Pollution

7. Factors effecting traffic noise Type of traffic flow speed , Tyre-road surface interaction : Road surface condition: The noise generated by various parts of vehicle: Large H.P. Diesel engine vehicle, Commercial truck, Tractor-trolly, transport vehicle are the main source of noise . Motor cycles, scooter, tempos, and minibuses are generally noiser as compared to passenger cars.

8. Effect of traffic noise Subjective effect: annoyance, disturbance, dis-satisfaction and noisiness. It is difficult to measure this precisely. Behavioral effect: interference to with sleep, speak or any general task. It can cause disturbance in enjoyment of T.V. class room studies and other tasks involving mental actives . Physiological effects: It causes fright phenomena, resulting in harmful effect in various parts of body periods. At extremely high level and for a long period of exposures it may produce deafens Further continuous noise causes cardiovascular effects, increases blood pressure. & heart rates.

9. Noise pollution prevention and control tips Below are a few things people and governments can do to make our communities and living laces quieter : Construction of soundproof rooms. Use of horns with jarring sounds, motorbikes with damaged exhaust pipes, noisy trucks to be banned. Noise producing industries, airports, bus and transport terminals and railway stations to sighted far from where living places . Vegetation (trees) along roads and in residential areas is a good way to reduce noise pollution as they absorb sound.

10. Noise pollution prevention and control tips Roadway noise  can be reduced by the use of  noise barriers , limitation of vehicle speeds, alteration of roadway surface texture, limitation of  heavy vehicles , use of traffic controls that smooth vehicle flow to reduce braking and acceleration, and tire design. An important factor in applying these strategies is a  computer model  for  roadway noise , that is capable of addressing local  topography ,  meteorology , traffic operations, and hypothetical mitigation. Costs of building-in mitigation can be modest, provided these solutions are sought in the planning stage of a roadway project.