Simulation of AVAS for Prototypes using FE and PML

Electric vehicles, known for their quiet operation, can pose safety risks at low speeds due to their silence without traditional combustion engine sounds. To address this, many countries require Acoustic Vehicle Alerting Systems (AVAS), which emit sounds to alert pedestrians. AVAS sound testing is conducted with microphones placed 2 meters from the vehicle, measuring sound in both stationary and driving states up to 31 km/h in North America. Correct loudspeaker placement ensures accurate transmission to measurement microphones, aiding in regulatory compliance. To simulate AVAS sound transmission without a physical prototype, a digital model is created using the Finite Element Method (FEM) and a Perfectly Matched Layer (PML). This setup replicates real test conditions, predicting the sound transmission from the speaker in the engine bay to external microphones. This study validates AVAS simulations against real vehicle data, demonstrating frequency ranges of alignment between simulation results and reference vehicle data for the Q6 e-tron. The transfer functions from these simulations will be used in Audi's e-Sound GUI, reducing dependency on prototypes and saving development time and resources.     «

Electric vehicles, known for their quiet operation, can pose safety risks at low speeds due to their silence without traditional combustion engine sounds. To address this, many countries require Acoustic Vehicle Alerting Systems (AVAS), which emit sounds to alert pedestrians. AVAS sound testing is conducted with microphones placed 2 meters from the vehicle, measuring sound in both stationary and driving states up to 31 km/h in North America. Correct loudspeaker placement ensures accurate tr...     »