用声音信号追踪位置，实现动态听区的稳定声场控制
Robust Fixed-Filter Sound Zone Control with Audio-Based Position Tracking
- 基于字典的方法，仅靠声音信号实时追踪听众位置
- 字典包含所有位置时，声场控制效果最优；部分覆盖也优于传统固定滤波方法
- 适合需要移动听众场景的智能音箱、会议室等应用
实际应用场景中，声区控制（SZC）系统性能对听众位置高度敏感，听众移动时性能显著下降。本文提出一种鲁棒的SZC系统，通过基于字典的方法自适应动态变化，如移动听众和可变声区位置。该系统仅使用音频信号持续监测环境，并根据听众位置更新固定控制滤波器。通过采用实际测量的混响响应进行仿真验证，结果表明：当字典中包含所有听众位置时，系统达到最优性能；即使未涵盖全部位置，相比传统固定滤波方案，仍能显著提升性能。
原文摘要 · Abstract (English)
Performance of sound zone control (SZC) systems deployed in practical scenarios are highly sensitive to the location of the listener(s) and can degrade significantly when listener(s) are moving. This paper presents a robust SZC system that adapts to dynamic changes such as moving listeners and varying zone locations using a dictionary-based approach. The proposed system continuously monitors the environment and updates the fixed control filters by tracking the listener position using audio signals only. To test the effectiveness of the proposed SZC method, simulation studies are carried out using practically measured impulse responses. These studies show that SZC, when incorporated with the proposed audio-only position tracking scheme, achieves optimal performance when all listener positions are available in the dictionary. Moreover, even when not all listener positions are included in the dictionary, the method still provides good performance improvement compared to a traditional fixed filter SZC scheme.
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