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arXiv · 2610.00721

Frequency-Weighted Soft-Constrained Spatially Selective Active Noise Control for Open-Fitting Hearables

Tong Xiao·Reinhild Roden·Matthias Blau·Simon Doclo
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Abstract

Recently, soft-constrained spatially selective active noise control (SSANC) for open-fitting hearables has been proposed to enable a flexible trade-off between noise reduction and desired-speech preservation using a scalar trade-off parameter across all frequencies. This paper generalizes soft-constrained SSANC by introducing frequency-dependent weighting of the desired-speech preservation error while maintaining low-delay time-domain active control. Frequency-dependent weightings based on the speech intelligibility index (SII), the modified intermediate reference system (MIRS), the long-term average speech spectrum (LTASS), and a signal-dependent oracle are compared with scalar weighting using measured acoustic impulse responses in a multi-speaker scenario. The results show that LTASS and oracle weightings provide the largest speech-intelligibility improvements and comparable speech-quality improvements at substantially lower distortion levels than those obtained with SII and MIRS weightings. While the oracle weighting provides the best overall perceptual trade-off, LTASS weighting provides a comparable perceptual trade-off without requiring the clean desired-speech signal.

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Tong Xiao, Reinhild Roden, Matthias Blau, Simon Doclo. 2026-09-30. Frequency-Weighted Soft-Constrained Spatially Selective Active Noise Control for Open-Fitting Hearables. https://arxiv.org/abs/2610.00721

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