被打断的马赛克语音重新审视:通过拉伸来增加和减少可理解性 ()
Kazuo Ueda1, Masashi Hashimoto2, Hiroshige Takeichi3
1Department of Acoustic Design, Faculty of Design/Research Center for Applied Perceptual Science/Research and Development Center for Five-Sense Devices, Kyushu University, 4-9-1 Shiobaru, Minami-ku, Fukuoka 815-8540, Japan.
The Journal of the Acoustical Society of America
|March 5, 2024
概括
伸展暂时中断的语音 (马赛克语音) 提高了可理解性,特别是在更短的间隔. 然而,较长的间隔导致理解减少,这表明感知单元长度和语音速度影响语音可理解性降低.
科学领域:
- 听觉感知是一种听觉感知.
- 语音处理 语音处理
- 声学语音学的声音学
背景情况:
- 之前的研究表明,通过延伸频谱来增加可理解性,时间退化语音.
- 然而,早期的研究混了间隙持续时间和时间解析.
- 目前的研究旨在解开这些因素在马赛克语言.
研究的目的:
- 通过将中断效应与时间分辨率分离来研究马赛克语音的可理解性.
- 为了检查如何拉伸语音段以填补沉默的空白,影响不同中断持续时间的可理解性.
- 探索可理解性变化的潜在解释,包括听觉分组,调制解,语音恢复和概率总和模型.
主要方法:
- 用20个频段和20毫秒段持续时间创建了马赛克语音.
- 语音刺激被中断了不同的间隔时间 (20毫秒,80毫秒,160毫秒).
- 拉伸语音段的效果,以填补这些差距的可理解性,在21名参与者中进行了测量.
主要成果:
- 不间断的马赛克语音的可理解性为95%.
- 间隔20毫秒和80毫秒的中断使理解率分别降低到78%和33%.
- 拉伸段以填补20毫秒和80毫秒的间隔,可分别提高理解率至92%和54%.
- 拉伸段为160ms的间隔使得可理解性降低到9%.
结论:
- 拉伸语音段可以提高频谱时间退化语音的可理解性,特别是在更短的中断时.
- 观察到的可理解性损失与更长的间隔表明在感知处理的局限性.
- 概率总和模型有效地解释了"U"形的可理解曲线和收益/损失模式,突出了感知单位长度和语音速率的作用.
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