An Efficient Procedure for Visualizing the Sound Field Radiated by Vehicles During Standardized Passby Tests 1999-01-1741
Spherical beamforming was used to visualize sound radiation during a vehicle passby test. Forward and backward propagation procedures are compared in terms of computational expense. A spherical spreading correction factor is described, along with a maximum liklihood procedure for obtaining an optimal array weighting dependent on the relative distance between the microphones and the focus point. The de-Dopplerized microphone outputs are multiplied by the weighting factors and summed to yield the source strengths over a reconstruction plane “attached” to the vehicle. Results obtained using a 16 element sparse array during an actual passby are used to demonstrate the present approach.
Citation: Kook, H., Moebs, G., Davies, P., and Bolton, J., "An Efficient Procedure for Visualizing the Sound Field Radiated by Vehicles During Standardized Passby Tests," SAE Technical Paper 1999-01-1741, 1999, https://doi.org/10.4271/1999-01-1741. Download Citation
H. Kook, G. B. Moebs, P. Davies, J. S. Bolton
Noise & Vibration Conference & Exposition
Proceedings of the 1999 Noise and Vibration Conference-P-342