This work describes the sound synthesis of moving sources for the evaluation of pass-by noise scenarios. The proposed approach is based on transfer path analysis (TPA) from vehicle components to a semi-circular microphone array, enabling a decomposition in terms of spherical harmonics. The source signals are estimated by setting microphone indicators around source locations (engine compartment, tires) and by solving TPA inverse problems. A key feature lies in the simultaneous measurement of the pressure data at indicator and semi-circular array microphones. The spherical harmonic domain allows the sources to be moved smoothly in space, enabling the simulation of any trajectory including the Doppler effect. Finally, the propagated source signal is decoded using an inverse spherical transform to synthesize the binaural output. This approach renders a dynamic spatial audio environment that can be synchronized with a visualization tool. To illustrate the technique, preliminary results of an electric vehicle measured indoors are shown.
https://www.aes.org/e-lib/browse.cfm?elib=21806
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