An improved acoustic holography for high-speed sound sources identification and visualization

摘要

Sound source and field measurement is the basis for noise control. Due to large errorsrncaused by Doppler-effect existing methods cannot be directly applied to high-speed soundrnsource. Our objective is to establish an acoustic holography method for high-speed soundrnsources location and visualization. We will accurately achieve the de-dopplerization in therntime domain with complete sound pressure calculation model of Morse acoustic theory andrncalculus methods. This method can restore the lossless accuracy sound signals, eliminatingrnDoppler-effect perfectly. By applying this method to our diffraction acoustic holography,rnwe develop an improved acoustic holography for high-speed sound sources visualization.rnEstablishment of high-speed moving sound sources acoustic model is used to verify thernhigh-speed de-dopplerization effect. Simulation experiments are designed to validate thernalgorithm and obtain visualization results. The increased complexity of algorithm willrnaffect calculation efficiency, calls for further optimization. This study will extend thernapplications of acoustic measurement technique and help accurately understand highspeedrnsound source characteristics. This study lays a foundation for further research onrnvehicle noise pollution control.