Acoustic fields 1 Acoustic propagation 1 Backpropagation 1 Broadband acoustic source China 1 Deep learning 1 Learning approach 1 Learning sources 1 Magnitude only data 1 Source localization 1 Two-step training 1 Uncertain environments 1 Uncertainty analysis 1 Yellow Sea 1 article 1 deep learning 1 simulation 1 sound 1 uncertainty 1