Younghwa Lee, Il-Sik Chang, Suseong Oh, Youngjin Nam, Youngteuk Chae, Geonyoung Choi, Gooman Park, Vol. 17, No. 6, June 30, 2023
10.3837/tiis.2023.06.001

• Motor gearbox
• Operating sound
• Mel-spectrogram
• Anomaly Detection
• Normalizing Flow
• Hierarchical feature extraction