Parametric model for emulating absorbing infinite plane in pass-by noise simulations

Vehicle pass-by noise regulations are becoming increasingly stringent, necessitating advanced simulation methods. Traditional approaches involving half-space Green's function are resource-intensive and limited in handling varying impedance and geometry. To overcome these limitations, a novel method is proposed, focusing on directly modeling the truncated floor to achieve accurate results with a reduced computational cost. This study employs Boundary Element Method with Adaptive Order (BEMAO) technology and incorporates a modified Euler spiral formulation to account for floor discontinuity. The method is extended to include vehicle and microphone geometry, simulating realistic pass-by noise scenarios. Numerical comparisons with half-space Green's function using both a simple shoe-box model and a realistic car model demonstrate the effectiveness of this approach.