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Time series anomaly detection is extensively studied in statistics, economics, and computer science. Over the years, numerous methods have been proposed for time series anomaly detection using deep learning-based methods. Many of these…

Machine Learning · Computer Science 2022-08-25 Shahroz Tariq , Binh M. Le , Simon S. Woo

We propose an outlier robust multivariate time series model which can be used for detecting previously unseen anomalous sounds based on noisy training data. The presented approach doesn't assume the presence of labeled anomalies in the…

Sound · Computer Science 2022-02-07 Wo Jae Lee , Karim Helwani , Arvindh Krishnaswamy , Srikanth Tenneti

The acoustic sensitivity of Autism Spectrum Disorder (ASD) individuals highly impacts their intelligibility in noisy urban environments. In this Letter, the disturbance sensing level is examined with perceptual listening tests that…

Audio and Speech Processing · Electrical Eng. & Systems 2025-05-16 Marcelo Pillonetto , Anderson Queiroz , Rosângela Coelho

Weakly labeled datasets such as AudioSet have driven recent progress in audio tagging. However, annotation quality varies across sound classes. Labels may be incomplete, ambiguous, or unreliable, which introduces class-dependent supervision…

Audio and Speech Processing · Electrical Eng. & Systems 2026-05-19 Yuanbo Hou , Zhaoyi Liu , Tong Ye , Qiaoqiao Ren , Jian Guan , Wenwu Wang , Stephen Roberts

Use of an autoencoder (AE) as a normal model is a state-of-the-art technique for unsupervised-anomaly detection in sounds (ADS). The AE is trained to minimize the sample mean of the anomaly score of normal sounds in a mini-batch. One…

Audio and Speech Processing · Electrical Eng. & Systems 2019-07-22 Yuma Koizumi , Shoichiro Saito , Masataka Yamaguchi , Shin Murata , Noboru Harada

Anomalies represent deviations from the intended system operation and can lead to decreased efficiency as well as partial or complete system failure. As the causes of anomalies are often unknown due to complex system dynamics, efficient…

Machine Learning · Computer Science 2021-08-31 Benjamin Lindemann , Benjamin Maschler , Nada Sahlab , Michael Weyrich

Training-free anomalous sound detection (ASD) based on pre-trained audio embedding models has recently garnered significant attention, as it enables the detection of anomalous sounds using only normal reference data while offering improved…

Audio and Speech Processing · Electrical Eng. & Systems 2026-03-06 Kevin Wilkinghoff , Sarthak Yadav , Zheng-Hua Tan

Early identification of Autism Spectrum Disorder (ASD) is considered critical for effective intervention to mitigate emotional, financial and societal burdens. Although ASD belongs to a group of neurodevelopmental disabilities that are not…

Despite the continuous proposal of new anomaly detection algorithms and extensive benchmarking efforts, progress seems to stagnate, with only minor performance differences between established baselines and new algorithms. In this position…

Machine Learning · Computer Science 2025-07-22 Philipp Röchner , Simon Klüttermann , Franz Rothlauf , Daniel Schlör

Automated speech analysis is a thriving approach to detect early markers of Alzheimer's disease (AD). Yet, recording conditions in most AD datasets are heterogeneous, with patients and controls often evaluated in different acoustic…

Sound event detection (SED) is a task to detect sound events in an audio recording. One challenge of the SED task is that many datasets such as the Detection and Classification of Acoustic Scenes and Events (DCASE) datasets are weakly…

Sound · Computer Science 2020-08-25 Qiuqiang Kong , Yong Xu , Wenwu Wang , Mark D. Plumbley

We can often verify the correctness of neural network outputs using ground truth labels, but we cannot reliably determine whether the output was produced by normal or anomalous internal mechanisms. Mechanistic anomaly detection (MAD) aims…

Machine Learning · Computer Science 2026-05-26 Hugo Lyons Keenan , Christopher Leckie , Sarah Erfani

When detecting anomalous sounds in complex environments, one of the main difficulties is that trained models must be sensitive to subtle differences in monitored target signals, while many practical applications also require them to be…

Audio and Speech Processing · Electrical Eng. & Systems 2025-09-23 Kevin Wilkinghoff , Takuya Fujimura , Keisuke Imoto , Jonathan Le Roux , Zheng-Hua Tan , Tomoki Toda

Many applications of speech technology require more and more audio data. Automatic assessment of the quality of the collected recordings is important to ensure they meet the requirements of the related applications. However, effective and…

Audio and Speech Processing · Electrical Eng. & Systems 2020-05-19 Qiang Huang , Thomas Hain

Sequence labeling systems should perform reliably not only under ideal conditions but also with corrupted inputs - as these systems often process user-generated text or follow an error-prone upstream component. To this end, we formulate the…

Computation and Language · Computer Science 2020-05-15 Marcin Namysl , Sven Behnke , Joachim Köhler

Audio Deepfake Detection (ADD) aims to detect spoof speech from bonafide speech. Most prior studies assume that stronger correlations within or across acoustic and emotional features imply authenticity, and thus focus on enhancing or…

Sound · Computer Science 2026-01-21 Jinhua Zhang , Zhenqi Jia , Rui Liu

Time series anomaly detection is widely used in IoT and cyber-physical systems, yet its evaluation remains challenging due to diverse application objectives and heterogeneous metric assumptions. This study introduces a problem-oriented…

Artificial Intelligence · Computer Science 2026-05-15 Kaixiang Yang , Jiarong Liu , Yupeng Song , Shuanghua Yang , Yujue Zhou

Automated respiratory sound classification faces practical challenges from background noise and insufficient denoising in existing systems. We propose Adaptive Differential Denoising network, that integrates noise suppression and…

Audio and Speech Processing · Electrical Eng. & Systems 2025-06-04 Gaoyang Dong , Zhicheng Zhang , Ping Sun , Minghui Zhang

How secure automatic speaker verification (ASV) technology is? More concretely, given a specific target speaker, how likely is it to find another person who gets falsely accepted as that target? This question may be addressed empirically by…

Audio and Speech Processing · Electrical Eng. & Systems 2019-11-05 Alexey Sholokhov , Tomi Kinnunen , Ville Vestman , Kong Aik Lee

The state-of-the-art approach for semi-supervised anomalous sound detection is to first learn an embedding space by using auxiliary classification tasks based on meta information or self-supervised learning and then estimate the…

Audio and Speech Processing · Electrical Eng. & Systems 2024-08-23 Kevin Wilkinghoff