在存在扩展的高频线索的情况下,语音识别的频段重要性
Rohit M Ananthanarayana1, Emily Buss2, Brian B Monson1,3
1Department of Speech and Hearing Science, University of Illinois Urbana-Champaign, Champaign, Illinois 61820, USA.
The Journal of the Acoustical Society of America
|August 19, 2024
概括
扩展高频 (EHF) 对于语音识别至关重要,当背景说话者不面对听众时. 这项研究强调了EHF在复杂的现实听力场景中的重要性.
科学领域:
- 听觉神经科学 听觉神经科学
- 语音感知 语音感知
- 声学 声学 在声学方面
背景情况:
- 传统的语音噪声研究往往忽略了扩展的高频率 (EHFs; 8-20 kHz).
- 最近的研究表明,EHF在多人交谈环境中有助于语音识别,特别是当掩盖EHF低于目标EHF时.
- 当目标演讲者面对听众,但掩面者没有时,这种情况自然发生.
研究的目的:
- 研究不同频段 (包括EHF) 对于语音内语音识别的重要性.
- 检查面具头部定向如何影响EHF在语音感知中的作用.
主要方法:
- 使用隙过来单独评估五个频段 (40 Hz20 kHz) 的语音识别测量.
- 使用一个女性目标说话器 (0°) 和一个两个说话器的女性面具 (0°或56.25°).
- 模拟的面具头部方向:面向听众 (0°) 和面向外方 (56.25°).
主要成果:
- 在面罩条件下,在0.41.3kHz范围内观察到峰值频段的重要性.
- 当面罩面向听众时,删除EHF的影响是可以忽略的.
- 在非面罩状态下,EHF的重要性显著增加,相当于3.38.3 kHz频段.
结论:
- 扩展高频 (EHF) 在与讲话者头部方向不匹配的场景中为语音识别提供了重要的线索.
- 与背景说话者相对的听众头部方向调节了EHF对语音可理解性的贡献.
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