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一个听觉的视角在婴儿时期的声学发展
Monica Hegde1, Thierry Nazzi1, Laurianne Cabrera1
1Integrative Neuroscience and Cognition Center (INCC-UMR 8002), Université Paris Cité-CNRS, Paris, France.
Frontiers in psychology
|February 8, 2024
概括
6-10个月的婴儿表现出发达的语音感知,而10个月的婴儿比6个月的婴儿更容易受到对辅音的听觉线索退化的影响. 这突显了婴儿随着时间的推移处理语音的变化.
科学领域:
- 听觉感知是一种听觉感知.
- 语音处理 语音处理
- 发展心理学是发展心理学.
背景情况:
- 听觉系统通过光谱时间调制来处理语音,包括振幅变化 (AM) 和频率调制 (FM).
- 成年人依赖缓慢的AM线索 (<8-16 Hz) 来说话,而婴儿也需要更快的AM线索 (>8-16 Hz).
研究的目的:
- 调查典型听觉的婴儿 (6个月和10个月) 和成年人如何在受损的听觉条件下感知声学特征.
- 为了确定6到10个月龄之间的语音感知听觉暗示权重的发育变化.
主要方法:
- 用一种心理物理方法来测试辅音-母音音节的语音分类.
- 听觉条件涉及降低频率调制 (FM) 线索和振幅调制 (AM) 线索的快速 (> 8 Hz) 和慢速 (< 8 Hz) 速率.
主要成果:
- 婴儿和成年人可以用降低的FM和快速的AM线索来分类语音,但在缓慢的AM线索中,性能下降.
- 声母分类显示了与年龄相关的差异,成年人表现优于两个婴儿组.
- 辅音分类显示,10个月大的孩子比6个月大的孩子更容易受到时间退化的影响.
结论:
- FM和更快的AM线索的降解显著影响了10个月大的婴儿的辅音处理.
- 在6到10个月之间,婴儿在处理语音时间线索中表现出明显的发育转变,声母与辅音相比,可能与语音发展有关.
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