Exterior noise prediction of light duty truck based on near-field acoustic holography

The basic principle of broadband acoustic holography based on intensity measurement (BAHIM) is demonstrated. Numerical simulation is made with point source as object, and reconstruction phase of the complex sound pressure is exactly obtained. The light duty truck manufactured by some Chinese auto manufacturer was tested with BAHIM, the radiated sound field of the noise source is forecasted, the far-field noise forecast is validated by intensity measurement experimentation, and the exterior noise source of the truck is identified. The result of the exterior noise test demonstrates that BAHIM is an effective method of noise source identification and forecast.