Noise load of a car on the environment

Abstract

The questions of influence of transport noise on the environment are considered. A comparison of the noise field of passenger cars of Renault brand is made. Rational noise field and the direction index of a car, which increases the safety of road users is proposed.
We indicated the noise field of the Renault Symbol car and proposed a rational noise field, for which formation is required: adherence to the permissible noise level at a distance of 7.5 m from the longitudinal axis of the car; providing increased direction of noise along the direction of motion as a factor in additional informing pedestrians and drivers about the approach of the car to ensure their safety; providing different indicator of the direction of the right or left side of the car depending on the organization of traffic (right or left-hand traffic).
Analyzing the nature of the noise field obtained, it can be argued that the distribution of the noise level around the Renault Symbol has the greatest impact on the engine. The noise from the exhaust gases on the noise field has a lower effect than the noise of the actual engine.
Thus, reducing the overall noise level of a car without losing its source level can be achieved by redistributing noise energy from right to left and in the direction of motion (back and forth).
Keywords: noise field, car, noise level, safety of road users, direction index.