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An Efficient Procedure for Visualizing the Sound Field Radiated by Vehicles During Standardized Passby Tests
ISSN: 0148-7191, e-ISSN: 2688-3627
Published May 17, 1999 by SAE International in United States
Annotation ability available
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.
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CitationKook, 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.
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