journal article·2021-11-24Open access

Unsupervised Anomalous Sound Detection for Machine Condition Monitoring Using Classification-Based Methods

Yaoguang Wang, Yaohao Zheng, Yunxiang Zhang, Yongsheng Xie, Sen Xu, Ying Hu, Liang He

Applied Sciences· Volume 11· Issue 23

Abstract

The task of unsupervised anomalous sound detection (ASD) is challenging for detecting anomalous sounds from a large audio database without any annotated anomalous training data. Many unsupervised methods were proposed, but previous works have confirmed that the classification-based models far exceeds the unsupervised models in ASD. In this paper, we adopt two classification-based anomaly detection models: (1) Outlier classifier is to distinguish anomalous sounds or outliers from the normal; (2) ID classifier identifies anomalies using both the confidence of classification and the similarity of hidden embeddings. We conduct experiments in task 2 of DCASE 2020 challenge, and our ensemble method achieves an averaged area under the curve (AUC) of 95.82% and averaged partial AUC (pAUC) of 92.32%, which outperforms the state-of-the-art models.
Source: crossref · Quality: baseline

Research context

OpenAlex topics: Music and Audio Processing · Anomaly Detection Techniques and Applications · Water Systems and Optimization

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Electronic Engineering, Tsinghua University, Beijing 100084, China

School of Information Science and Engineering, Xinjiang University, Urumqi 830046, China

State Grid Xinjiang Electric Power Company, Urumqi 830092, China

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