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Identifying Actions for Sound Event Classification

by   Benjamin Elizalde, et al.

In Psychology, actions are paramount for humans to perceive and separate sound events. In Machine Learning (ML), action recognition achieves high accuracy; however, it has not been asked if identifying actions can benefit Sound Event Classification (SEC), as opposed to mapping the audio directly to a sound event. Therefore, we propose a new Psychology-inspired approach for SEC that includes identification of actions via human listeners. To achieve this goal, we used crowdsourcing to have listeners identify 20 actions that in isolation or in combination may have produced any of the 50 sound events in the well-studied dataset ESC-50. The resulting annotations for each audio recording relate actions to a database of sound events for the first time [Annotations will be released after revision.]. The annotations were used to create semantic representations called Action Vectors (AVs). We evaluated SEC by comparing the AVs with two types of audio features – log-mel spectrograms and state of the art audio embeddings. Because audio features and AVs capture different abstractions of the acoustic content, we combined them and achieved one of the highest reported accuracies (86.75 that Psychology-inspired approaches can improve SEC.


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