Petrol and Diesel Engines Sound Measuring and Analyzing in Real Road Conditions

The problem of transport noise has two sides: external noise affecting the inhabitants of the settlement and noise in the vehicle where the driver's workplace and the seats of the passengers are. The object of research is the level of the generated internal noise emitted by the movement of a car on the territory of the city of Sofia. The values of the basic equivalent level of noise emitted during the movement of two laboratory cars of the same class with gasoline and diesel engines were determined. A comparison was made of the noise generated during aggressive and normal driving by the driver of the cars.