用耳机传感骨传导语音
Sensing Bone-Conducted Speech with Earbuds
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中文总结 AI 辅助
本研究以两款耳机为对象，分析OV诱发耳机振动的带宽和空间特性，发现其频谱呈低通特性、空间振动沿耳道入口内外方向，单轴传感器可低衰减捕获400Hz以下高功率振动，为耳机OV捕获的传感器选择和放置提供依据。
中文摘要 AI 辅助
使用耳机进行移动通信时，清晰捕获佩戴者自身语音（OV）至关重要，但在嘈杂环境中捕获OV仍具挑战性。骨传导（BC）语音可通过耳机外壳的振动被传感，能用于改善OV捕获，但OV诱发的耳机振动的带宽和空间特性均未被详细分析，而这两种特性对传感器选择和放置等场景十分相关。本研究基于两款耳机的测量数据，对这两种特性展开研究：频谱方面，结果显示OV诱发的耳机振动呈现低通特性，在400Hz以上以每十倍频程-93dB的陡峭滚降，因此需要噪声底相对较低的传感器来传感1kHz以上的振动；空间方面，结果显示耳机主要沿耳道入口的内外方向振动，不同受试者及不同佩戴适配情况间一致性较高，模拟结果证实，这使得单轴传感器可捕获400Hz以下的高功率振动，平均衰减小于1.5dB。
英文摘要
Clear capture of the wearer's own voice (OV) is essential when using earbuds for mobile communication. However, OV capture remains challenging in noisy environments. Bone-conducted (BC) speech, which can be sensed as vibrations of the earbud housing, can be used to improve OV capture. However, neither bandwidth nor spatial characteristics of OV-induced earbud vibrations have been analyzed in detail, despite both characteristics being relevant, e.g., for sensor choice and placement. This study investigates both characteristics, based on measurements with two earbud models. Spectrally, results indicate that OV-induced earbud vibrations exhibit a low-pass characteristic, with a steep roll-off of -93 dB per decade above 400 Hz. Thus, sensors with comparatively low noise floors are required to sense the vibrations above \SI{1}{\kilo\hertz}. Spatially, results indicate that the earbuds mainly vibrate in and out of the ear canal entrance, with high consistency between subjects and fits. Simulations confirm that this enables capture of the high-power vibrations below 400 Hz by a single-axis sensor with less than 1.5 dB mean attenuation.
发表机构
- Institute of Communication Systems (IKS), RWTH Aachen University（亚琛工业大学通信系统研究所）
机构由 AI 辅助整理，请以论文原文为准。
