Презентация на тему Noise pollution by road

2. Experimental study
2.1. Practical work "Study noise pollution"

2.2. Social survey
2.3. Classification of noise Chapter
3. State of the problem reduce traffic noise Chapter
4. To limit the impact of road traffic noise Conclusion

perceived by people as unpleasant, disturbing or even causing

soreness factor.

zagryazneniya environment. The increase in noise levels above natural

negative effect per person: increased fatigue, reduced mental activity, there are neuroses.

level meter: the simplest case, it consists of an

amplifier to the input of which is connected a measuring microphone, and to the output of the voltmeter widget in decibels.

system, and at the entrance to the ear sound

spectrum is quite different from what comes to the eardrum: the sounds of certain frequencies are amplified, and some, on the contrary, weakened. To take this into account, in the sound level meter, introduced the so-called A - Sound pressure level correction approximating characteristic sensitivity to the human ear.

General case, methods to reduce traffic noise can be

classified into the following three areas: reduction of noise at source of its origin, including the withdrawal from service of vehicles and changing the routes of traffic; noise reduction in the way of its dissemination; the use of noise perception of sound.

with the establishment of the sources of this noise.

Cars are the dominant source of intense and prolonged noise, which is any comparison do not go to any other. The noise generated by moving vehicles, is part of the noise of the traffic. In the General case, most noise is generated by heavy vehicles.

State the problem of reducing traffic noise

is possible to achieve a substantial noise reduction for

a significant number of people through the creation of feeder roads, specially designed for heavy traffic and ease tension of the transport network that permeates living quarters. The noise reduction of road transport also aims limiting the number of heavy goods vehicles in the transport stream.

effective noise isolation – very important. The ability to

be quiet – an indicator of human culture and his good attitude towards others. Based on knowledge, it is possible to take measures for their own safety.