Auralisation of accelerating passenger cars
Invited paper
Empa
Tuesday 2 june, 2015, 08:40 - 09:00
0.3 Copenhagen (49)
Abstract:
Within the research project TAURA, a traffic noise auralisator will be developed that covers road traffic and railway noise. The key element is a synthesizer that simulates the acoustical emission of a great many of dif-ferent vehicles, operating on a wide variety of surfaces and under different operating conditions. To obtain the corresponding steering parameters, a hierarchic synthesizer structure with core parameters and global parameters is proposed. While the core parameters will be determined with controlled experiments for a small number of vehicles, the global parameters are measured for a large vehicle fleet. This paper focusses on the emission synthesizer of accelerating passenger cars. The core parameters for the tire noise sources were determined from pass-by measurements of passenger cars with idling engine. To obtain the propulsion noise parameters, measurements at different engine speeds, engine loads and emission angles were performed using a chassis dynamometer. The structure of the additive sound synthesizer and the signal processing algorithms to extract its steering parameters from measurement data will be presented.