为开放式耳智能眼镜开发实时降噪系统，无需密封耳道即可有效抑制环境噪音。
Active noise cancellation on open-ear smart glasses
- 利用镜框上8个麦克风阵列估算耳部噪声，生成实时反向降噪信号。
- 在100–1000 Hz频段实现9.6 dB平均降噪（无校准），11.2 dB（校准后）。
- 首个无需耳道封闭的开放式耳智能眼镜实时主动降噪方案，适合移动用户。
智能眼镜正成为日益普及的可穿戴平台，音频是其关键交互方式。然而，在嘈杂环境中听音仍具挑战性，因为智能眼镜采用开放耳扬声器，无法密封耳道。此外，开放耳设计与传统主动降噪（ANC）技术不兼容，后者依赖位于耳道内部或入口处的误差麦克风来测量抵消后的残余声音。本文提出首个面向开放耳智能眼镜的实时主动降噪系统，仅使用嵌入眼镜框架中的麦克风和微型开放耳扬声器，即可实现环境噪声抑制。我们构建了定制眼镜原型，并在8种不同环境、移动状态下的100–1000 Hz频率范围内进行用户研究，该频段为环境噪声集中区。系统实现无校准条件下平均降噪9.6 dB，经简短用户特异性校准后达11.2 dB。
原文摘要 · Abstract (English)
Smart glasses are becoming an increasingly prevalent wearable platform, with audio as a key interaction modality. However, hearing in noisy environments remains challenging because smart glasses are equipped with open-ear speakers that do not seal the ear canal. Furthermore, the open-ear design is incompatible with conventional active noise cancellation (ANC) techniques, which rely on an error microphone inside or at the entrance of the ear canal to measure the residual sound heard after cancellation. Here we present the first real-time ANC system for open-ear smart glasses that suppresses environmental noise using only microphones and miniaturized open-ear speakers embedded in the glasses frame. Our low-latency computational pipeline estimates the noise at the ear from an array of eight microphones distributed around the glasses frame and generates an anti-noise signal in real-time to cancel environmental noise. We develop a custom glasses prototype and evaluate it in a user study across 8 environments under mobility in the 100--1000 Hz frequency range, where environmental noise is concentrated. We achieve a mean noise reduction of 9.6 dB without any calibration, and 11.2 dB with a brief user-specific calibration.
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