Měření hluku vozidel v rámci legislativních požadavků

Abstract

This bachelor thesis provides an insight into the issue of acoustic pressure measurement in automobiles. The aim of the paper is to identify noise levels in one selected type of a commercial electro mobile and compare those with an electro mobile prototype fabricated within the department of Materials and Technologies for Automobiles. In the theoretical part, there are described definitions of the main physics quantities linked to sound and history of their capturing. Furthermore, sources of the vehicle exterior noise and the impact of noise on human health are included. Means of noise reducing of the vehicle itself just as precautions to minimalize the noise of the infrastructure together with sources of the vehicle interior noise are also described. The practical part deals with noise measuring methods in vehicles. Moreover, necessary preparations of the measuring devices and the volume thresholds which the vehicle must follow are described there. Practically performed procedure of noise measuring of an electric vehicle Skoda Enyaq are described as well. The collected data show that the selected car model noise levels fall into the scope of referential levels.