Tag: bioacoustics

Multi-label imbalanced classification poses a significant challenge in machine learning, particularly evident in bioacoustics where animal sounds often co-occur, and certain sounds are much less frequent than others. This paper focuses on the specific case of classifying anuran species sounds using the dataset AnuraSet, that contains both class imbalance and multi-label examples. To address these challenges, we introduce Mixture of Mixups (Mix2), a framework that leverages mixing regularization methods Mixup, Manifold Mixup, and MultiMix. Experimental results show that these methods, individually, may lead to suboptimal results; however, when applied randomly, with one selected at each training iteration, they prove effective in addressing the mentioned challenges, particularly for rare classes with few occurrences. Further analysis reveals that the model trained using Mix2 is also proficient in classifying sounds across various levels of class co-occurrences.

Our article presents an algorithm for pairwise intersection of intervals by performing binary search within sorted onset and offset times. Computational benchmarks on the BirdVox-full-night dataset confirms that our algorithm is significantly faster than exhaustive search. Moreover, we explain how to use this list of intersecting prediction-reference pairs for the purpose of SED evaluation.