用单一的结构振动传感器估计到达反响环境的方向,以检测唤醒词
Jenna Rutowski1, Tre DiPassio1, Benjamin R Thompson1
1Department of Electrical and Computer Engineering, University of Rochester, Rochester, New York 14624, USA.
The Journal of the Acoustical Society of America
|October 17, 2024
概括
使用弹性面板估计声波到达方向 (DOA) 在反响空间中不那么准确. 与来自不同环境的数据交叉训练系统可以提高DOA估计的可靠性.
科学领域:
- 声学 声学 声学 声学
- 振动分析是一种振动分析.
- 信号处理 信号处理
背景情况:
- 声波的到达方向 (DOA) 影响弹性面板的振动响应.
- 面板麦克风可以通过监控模态激发来推断DOA,但容易受到反响的影响.
- 以反射和分散场所为特征的反射环境可以掩盖DOA信息.
研究的目的:
- 通过使用面板麦克风,研究反响对DOA估计准确性的影响.
- 量化反响时间 (RT60) 和DOA估计性能之间的关系.
- 探索改进DOA估计系统在不同声学空间中的泛化方法.
主要方法:
- 在八个空间中记录了唤醒词的发言,反响时间各不相同 (0.273.00秒).
- 训练有素的神经网络使用记录的响应来估计DOA.
- 评估的DOA估计准确度在±5°范围内,在不同的反响条件下.
主要成果:
- DOA估计可靠性从最低反响空间的95.00%下降到最高反响空间的78.33%.
- 在声时间 (RT60) 和DOA估计准确度之间观察到一个反向关系.
- 与来自多个空间的数据交叉训练系统证明了对新的声学环境的改进概括.
结论:
- 反响显著降低了面板麦克风的DOA估计准确度.
- DOA估计的准确性与声环境的反响时间成反比例.
- 使用来自不同声空间的数据进行交叉训练的系统可以提高DOA估计的稳定性和通用性.
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