The Use of Acoustic-Intensity Scans for Sound Power Measurement and for Noise Source Identification in Surface Transportation Vehicles 810401
The results are reported of near-field, acoustic-intensity scans of a diesel-engine truck, chassis-mounted passenger-car engines, and a railroad locomotive. The measurements were made using the two-microphone, cross-spectral method of measuring acoustic intensity developed at General Motors. The results demonstrate the value of the method for measuring the overall sound power of a vehicle as well as for identifying its component noise sources. A review of theory and methodology is provided.
Citation: Pope, J., Hickling, R., Feldmaier, D., and Blaser, D., "The Use of Acoustic-Intensity Scans for Sound Power Measurement and for Noise Source Identification in Surface Transportation Vehicles," SAE Technical Paper 810401, 1981, https://doi.org/10.4271/810401. Download Citation
J. Pope, R. Hickling, D. A. Feldmaier, D. A. Blaser
Engineering Mechanics Dept. General Motors Research Laboratories Warren, Ml