An Efficient Procedure for Visualizing the Sound Field Radiated by Vehicles During Standardized Passby Tests
1999-01-1741
05/17/1999
- Event
- Content
- 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.
- Pages
- 12
- 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.