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Tuomas Virtanen

4 papers indexed

arxiveess.AScs.AIcs.SD2026-07-15

Cover First, Disagree Softly: Rethinking Mismatch-First Active Learning for Frame-Level Audio Classification

Shiqi Zhang, Tuomas Virtanen

Sound event detection relies on frame-level strong labels whose annotation is expensive. Active learning addresses this problem by selecting the audio segments whose labels help the classifier most. One of the prevailing acquisition strategies for this task, mismatch-first farthe…

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arxiveess.AScs.AIcs.SD2026-07-15

Greedy Volume Maximization of Gradient Embeddings for Long-Tailed Frame-Level Bioacoustic Active Learning

Shiqi Zhang, Marius Faiß, Ariana Strandburg-Peshkin, Tuomas Virtanen

Bioacoustic call-type classification relies on costly expert annotation. Active learning can reduce this burden by selecting a small batch of segments for expert annotation and using the labeled segments for training the classifier. The setting is hard: the target calls are extre…

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arxiveess.AScs.LG2026-07-01

Few-Shot Open-Set Audio Classification Using Attention Information-Fused Prototypes

Yanxiong Li, Jiaxin Tan, Qianqian Li, Guoqing Chen, Sen Huang, Tuomas Virtanen

Most existing audio classification methods suppose that each query (testing) sample belongs to a class of support (training) samples, and misrecognize samples of unseen classes as seen classes (cannot reject samples of unseen classes). In this study, we propose a method for Few-s…

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arxiveess.AScs.LGcs.SDeess.SP2026-07-01

CNN Models for Microphone Array Covariance Matrix Upsampling and Acoustic Imaging

Marianthi Adamopoulou, Parthasaarathy Sudarsanam, David Diaz-Guerra, Meng Jiang, Archontis Politis, Seyed Jalaleddin Mousavirad, et al.

Acoustic imaging visualization is a core methodology in acoustics, enabling spatial analysis of sound sources and acoustic scenes. However, limited sensor availability in practical systems motivate approaches that enhance spatial resolution without increasing the hardware complex…

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