The noise can be simply defined as any unwanted sound that we hear. Noise sources may or may not be related to the working activity of people who are exposed to them. When talking about unrelated, mostly for noise of traffic, which today is one of the most important environmental contaminants. In order to protect populated areas near roads, made the study of noise impact on the environment. In doing so, using different algorithms predicting noise levels. The algorithms predictions differ in the number and type of parameters used in the calculations, and the calculation method that is different from country to country. To the accuracy of the data obtained by the budget increase, it is necessary to introduce additional parameters and modify the calculation model. Noise protection is carried out in various ways. When noise manufacturing plants commonly used damping space and shielding noisy machines. When roads are commonly used sound barrier.