可听到的心跳:从耳朵记录心率
概括
耳朵中的身体合麦克风 (BCM) 可以估计心率 (HR). 虽然可行,但性能在个体和耳朵之间有很大差异,这凸显了基于耳朵的健康监测需要进一步研究的需要.
科学领域:
- 生物医学工程 生物医学工程
- 生理监测 生理监测
- 可穿戴技术可穿戴技术
背景情况:
- 纵向生理测量提供了比单个读数更完整的健康评估.
- 与心跳同步的心血管信号已在耳朵中使用身体合麦克风 (BCM) 检测到.
- 这表明通过基于耳朵的BCM来估计心率 (HR) 的潜力.
研究的目的:
- 为了研究使用放置在耳朵中的身体合麦克风 (BCM) 提取时间变化的心率 (HR) 的可行性.
- 与心电图 (ECG) 相比,评估基于BCM的HR估计的准确性和可靠性.
主要方法:
- 10名受试者在每个耳朵中用BCM进行了5分钟的记录.
- 估计心率 (HR) 使用PYIN音调检测算法,通过网格搜索优化超参数.
- 从BCM获得的HR估计与ECG记录进行了检测率,错误分布和根平均平方误差 (RMSE) 的比较.
主要成果:
- 在19个耳朵中有9个,HR估计的RMSE低于每分钟4次 (BPM).
- 然而,10名受试者中有4人表现出低检测率和高RMSE,这表明了显著的个体间变异性.
- 错误分布表明,基于BCM的HR估计是不偏见的.
结论:
- 使用耳朵中的身体合麦克风进行心率估计是可行的.
- 在检测率和HR误差方面存在相当大的耳间变化,可能是由于信号表示和算法性能.
- 基于BCM的心血管监测增强了耳朵级传感,对未来的健康应用具有前景.
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