Abstract:Deep learning requires a large amount of data to train network models in order to achieve good recognition performance, while underwater acoustic data is scarce and difficult to obtain. To solve this problem, a diffusion model-based underwater acoustic data augmentation method was adopted, which uses underwater acoustic data collected from offshore experiments for training, constructs a data generation model, generates high-quality data samples, and expands the training dataset. The experimental results show that when using AlexNet as a classification model for training, this method can reduce the recognition error rate by about 30% compared to traditional data augmentation methods, verifying the effectiveness of the method.