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arXiv · 2602.06921

The Combination of Several Decorrelation Methods to Improve Acoustic Feedback Cancellation

Klaus Linhard·Philipp Bulling
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Abstract

This paper extends an acoustic feedback cancellation system by incorporating multiple decorrelation methods. The baseline system is based on a frequency-domain Kalman filter implemented in a multi-delay structure. The proposed extensions include a variable time delay line, prediction, distortion compensation, and a simplified reverberation model. Each extension is analyzed, and a practical parameter range is defined. While existing literature often focuses on a single extension, such as prediction, to describe an optimal system, this work demonstrates that each individual extension contributes to performance improvements. Furthermore, the combination of all proposed extensions results in a superior system. The evaluation is conducted using publicly available datasets, with performance assessed through system distance metrics and the objective speech quality measure PSEQ.

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Klaus Linhard, Philipp Bulling. 2026-02-06. The Combination of Several Decorrelation Methods to Improve Acoustic Feedback Cancellation. https://arxiv.org/abs/2602.06921

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